How do I add in commands?

Up one category:
Tutorials

Introduction

The Commands script is used to allow for voice commands for various things, such as making random explosions, or changing the time of day.

Version one

function onChatted(msg, recipient, speaker)

	-- convert to all lower case

	local source = string.lower(speaker.Name)
	msg = string.lower(msg)

	
	if (msg == "day") then
		game.Lighting.TimeOfDay = "16:32:00"
	end
	

	if (msg == "night") then
		game.Lighting.TimeOfDay = "00:00:00"
	end

	-- Below is only for me
	if (source ~= "lavamaster") then return end

	if (msg == "deadly haze") then
		local m = Instance.new("Message")
		m.Text = "A mysterious haze is floating towards us..."
		m.Parent = game.Workspace
		wait(4)
		local c = game.Players:GetChildren()
		for i=1,#c do
			if (string.lower(c[i].Name) ~= "lavamaster") then
				if (c[i].Character ~= nil and c[i].Character.Humanoid ~= nil) then
					c[i].Character.Humanoid.Health = 0
				end
			end
		end
		wait(2)
		m.Parent = nil
	end

	if (msg == "boom!") then
		local m = Instance.new("Message")
		m.Text = "We're being bombed!"
		m.Parent = game.Workspace
		wait(4)
		for i=1,100 do
			local x = math.random(-200,200)
			local z = math.random(-200,200)
			local y = math.random(0,40)

			local r = math.random(6,16)

			local ex = Instance.new("Explosion")
			ex.Position = Vector3.new(x,y,z)
			ex.BlastRadius = r
			ex.Parent = game.Workspace
			wait(.05)
		end
		wait(2)
		m.Parent = nil
	end


end

function onPlayerEntered(newPlayer)
	newPlayer.Chatted:connect(function(msg, recipient) onChatted(msg, recipient, newPlayer) end) 
end

game.Players.ChildAdded:connect(onPlayerEntered)

Version two

function onChatted(msg, recipient, speaker)

	-- convert to all lower case

	local source = string.lower(speaker.Name)
	msg = string.lower(msg)

	
	if (msg == "day") then
		game.Lighting.TimeOfDay = "14:00:00"
	end
	

	if (msg == "night") then
		game.Lighting.TimeOfDay = "00:00:00"
	end

	if (msg == "normal") then

		game.Lighting.TimeOfDay = "0:00:00"
		game.Lighting.TopAmbientV9 = Color3.new(215,214,223)
		game.Lighting.SpotLightV9 = Color3.new(197,197,197)
		game.Lighting.BottomAmbientV9 = Color3.new(122,140,120)
		game.Lighting.TimeOfDay = "14:00:00"

	end

	if (msg == "neon") then

		game.Lighting.TopAmbientV9 = Color3.new(0,255,255)
		game.Lighting.SpotLightV9 = Color3.new(0,255,255)
		game.Lighting.BottomAmbientV9 = Color3.new(0,255,255)

	end

	if (msg == "red") then

		game.Lighting.TopAmbientV9 = Color3.new(255,0,0)
		game.Lighting.SpotLightV9 = Color3.new(255,0,0)
		game.Lighting.BottomAmbientV9 = Color3.new(255,0,0)

	end

	if (msg == "yellow") then

		game.Lighting.TopAmbientV9 = Color3.new(255,255,0)
		game.Lighting.SpotLightV9 = Color3.new(255,255,0)
		game.Lighting.BottomAmbientV9 = Color3.new(255,255,0)

	end

	if (msg == "green") then

		game.Lighting.TopAmbientV9 = Color3.new(0,255,0)
		game.Lighting.SpotLightV9 = Color3.new(0,255,0)
		game.Lighting.BottomAmbientV9 = Color3.new(0,255,0)

	end

	if (msg == "darkblue") then

		game.Lighting.TopAmbientV9 = Color3.new(0,0,255)
		game.Lighting.SpotLightV9 = Color3.new(0,0,255)
		game.Lighting.BottomAmbientV9 = Color3.new(0,0,255)

	end

	if (msg == "disco!") then

		game.Lighting.TopAmbientV9 = Color3.new(0,0,255)
		game.Lighting.SpotLightV9 = Color3.new(0,0,255)
		game.Lighting.BottomAmbientV9 = Color3.new(0,0,255)
		wait(0.5)
		game.Lighting.TopAmbientV9 = Color3.new(0,255,0)
		game.Lighting.SpotLightV9 = Color3.new(0,255,0)
		game.Lighting.BottomAmbientV9 = Color3.new(0,255,0)
		wait(0.5)
		game.Lighting.TopAmbientV9 = Color3.new(255,0,0)
		game.Lighting.SpotLightV9 = Color3.new(255,0,0)
		game.Lighting.BottomAmbientV9 = Color3.new(255,0,0)
		wait(0.5)
		game.Lighting.TopAmbientV9 = Color3.new(255,255,0)
		game.Lighting.SpotLightV9 = Color3.new(255,255,0)
		game.Lighting.BottomAmbientV9 = Color3.new(255,255,0)
		wait(0.5)
		game.Lighting.TopAmbientV9 = Color3.new(0,255,255)
		game.Lighting.SpotLightV9 = Color3.new(0,255,255)
		game.Lighting.BottomAmbientV9 = Color3.new(0,255,255)
		wait(0.5)
		game.Lighting.TopAmbientV9 = Color3.new(0,0,255)
		game.Lighting.SpotLightV9 = Color3.new(0,0,255)
		game.Lighting.BottomAmbientV9 = Color3.new(0,0,255)
		wait(0.5)
		game.Lighting.TopAmbientV9 = Color3.new(0,255,0)
		game.Lighting.SpotLightV9 = Color3.new(0,255,0)
		game.Lighting.BottomAmbientV9 = Color3.new(0,255,0)
		wait(0.5)
		game.Lighting.TopAmbientV9 = Color3.new(255,0,0)
		game.Lighting.SpotLightV9 = Color3.new(255,0,0)
		game.Lighting.BottomAmbientV9 = Color3.new(255,0,0)
		wait(0.5)
		game.Lighting.TopAmbientV9 = Color3.new(255,255,0)
		game.Lighting.SpotLightV9 = Color3.new(255,255,0)
		game.Lighting.BottomAmbientV9 = Color3.new(255,255,0)
		wait(0.5)
		game.Lighting.TopAmbientV9 = Color3.new(0,255,255)
		game.Lighting.SpotLightV9 = Color3.new(0,255,255)
		game.Lighting.BottomAmbientV9 = Color3.new(0,255,255)
		wait(0.5)
		game.Lighting.TimeOfDay = "0:00:00"
		game.Lighting.TopAmbientV9 = Color3.new(215,214,223)
		game.Lighting.SpotLightV9 = Color3.new(197,197,197)
		game.Lighting.BottomAmbientV9 = Color3.new(122,140,120)
		game.Lighting.TimeOfDay = "14:00:00"
	end

	if (source ~= "username") then return end--Change this to your name.

	if (msg == "die") then
		local m = Instance.new("Message")
		m.Text = "EVERYONE IS GONNA DIE!!!!!!!!!!"
		m.Parent = game.Workspace
		wait(4)
		local c = game.Players:GetChildren()
		for i=1,#c do
			if (string.lower(c[i].Name) ~= "username") then
				if (c[i].Character ~= nil and c[i].Character.Humanoid ~= nil) then
					c[i].Character.Humanoid.Health = 0
				end
			end
		end
		wait(2)
		m.Parent = nil
	end

	if (msg == "blackout") then

		game.Lighting.TopAmbientV9 = Color3.new(0,0,0)
		game.Lighting.SpotLightV9 = Color3.new(0,0,0)
		game.Lighting.BottomAmbientV9 = Color3.new(0,0,0)

	end



	if (msg == "listen") then

		local m = Instance.new("Message")
		m.Text = "EVERYONE STOP TALKING!!!!"
		m.Parent = game.Workspace
		wait(4)
		m.Parent = nil

	end



end

function onPlayerEntered(newPlayer)
	newPlayer.Chatted:connect(function(msg, recipient) onChatted(msg, recipient, newPlayer) end) 
end

game.Players.ChildAdded:connect(onPlayerEntered)

Version three

function onChatted(msg, recipient, speaker)

	local source = string.lower(speaker.Name)
	msg = string.lower(msg)

	
	if (msg == "day") then
		game.Lighting.TimeOfDay = "14:00:00"
	end
	

	if (msg == "night") then
		game.Lighting.TimeOfDay = "00:00:00"
	end

	if (msg == "normal") then

		game.Lighting.TimeOfDay = "0:00:00"
		game.Lighting.TopAmbientV9 = Color3.new(215,214,223)
		game.Lighting.SpotLightV9 = Color3.new(197,197,197)
		game.Lighting.BottomAmbientV9 = Color3.new(122,140,120)
		game.Lighting.TimeOfDay = "14:00:00"

	end

	if (msg == "neon") then

		game.Lighting.TopAmbientV9 = Color3.new(0,255,255)
		game.Lighting.SpotLightV9 = Color3.new(0,255,255)
		game.Lighting.BottomAmbientV9 = Color3.new(0,255,255)

	end

	if (msg == "red") then

		game.Lighting.TopAmbientV9 = Color3.new(255,0,0)
		game.Lighting.SpotLightV9 = Color3.new(255,0,0)
		game.Lighting.BottomAmbientV9 = Color3.new(255,0,0)

	end

	if (msg == "yellow") then

		game.Lighting.TopAmbientV9 = Color3.new(255,255,0)
		game.Lighting.SpotLightV9 = Color3.new(255,255,0)
		game.Lighting.BottomAmbientV9 = Color3.new(255,255,0)

	end

	if (msg == "green") then

		game.Lighting.TopAmbientV9 = Color3.new(0,255,0)
		game.Lighting.SpotLightV9 = Color3.new(0,255,0)
		game.Lighting.BottomAmbientV9 = Color3.new(0,255,0)

	end

	if (msg == "blue") then

		game.Lighting.TopAmbientV9 = Color3.new(0,0,255)
		game.Lighting.SpotLightV9 = Color3.new(0,0,255)
		game.Lighting.BottomAmbientV9 = Color3.new(0,0,255)

	end

	if (msg == "black") then

		game.Lighting.TimeOfDay = "00:00:00"
		game.Lighting.TopAmbientV9 = Color3.new(0,0,0)
		game.Lighting.SpotLightV9 = Color3.new(0,0,0)
		game.Lighting.BottomAmbientV9 = Color3.new(0,0,0)

	end

	if (msg == "white") then

		game.Lighting.TimeOfDay = "00:00:00"
		game.Lighting.TopAmbientV9 = Color3.new(255,255,255)
		game.Lighting.SpotLightV9 = Color3.new(255,255,255)
		game.Lighting.BottomAmbientV9 = Color3.new(255,255,255)

	end

	-- Below is the admin commands.
	if (source ~= "username") then return end --Change username to your name.

	if (msg == "die") then --Change this if you want.
		local m = Instance.new("Message")
		m.Text = "Test message"--Change this if you want.
		m.Parent = game.Workspace
		wait(4)
		local c = game.Players:GetChildren()
		for i=1,#c do
			if (string.lower(c[i].Name) ~= "username") then --change username to your name
				if (c[i].Character ~= nil and c[i].Character.Humanoid ~= nil) then
					c[i].Character.Humanoid.Health = 0
				end
			end
		end
		wait(2)
		m.Parent = nil
	end

	if (msg == "peoplewhite") then
		local c = game.Players:GetChildren()
		for i=1,#c do
			if (string.lower(c[i].Name) ~= username") then --Change username to your name.
				if (c[i].Character ~= nil and c[i].Character.Humanoid ~= nil) then
					c[i].Character:FindFirstChild("Head").BrickColor = BrickColor.new(1)
					c[i].Character:FindFirstChild("Torso").BrickColor = BrickColor.new(1)
					c[i].Character:FindFirstChild("Left Arm").BrickColor = BrickColor.new(1)
					c[i].Character:FindFirstChild("Right Arm").BrickColor = BrickColor.new(1)
					c[i].Character:FindFirstChild("Left Leg").BrickColor = BrickColor.new(1)
					c[i].Character:FindFirstChild("Right Leg").BrickColor = BrickColor.new(1)

				end
			end
		end
	end

	if (msg == "freeze") then
		local c = game.Players:GetChildren()
		for i=1,#c do
			if (string.lower(c[i].Name) ~= "username") then --Change username to your name.
				if (c[i].Character ~= nil and c[i].Character.Humanoid ~= nil) then
					c[i].Character:GindFirstChild("Torso").Anchored = true

				end
			end
		end
	end

	if (msg == "thaw") then
		local c = game.Players:GetChildren()
		for i=1,#c do
			if (string.lower(c[i].Name) ~= "username") then --Change username to your name.
				if (c[i].Character ~= nil and c[i].Character.Humanoid ~= nil) then
					c[i].Character:FindFirstChild("Torso").Anchored = false

				end
			end
		end
	end


	if (msg == "savagebeating") then --You may want to change this.
		local m = Instance.new("Message")
		m.Text = "Test message 1234"--Change this.
		m.Parent = game.Workspace
		wait(4)
		local c = game.Players:Gethildren()
		for i=1,#c do
			if (string.lower(c[i].Name) ~= "username") then --Change username to your name.
				if (c[i].Character ~= nil and c[i].Character.Humanoid ~= nil) then
					c[i].Character.Humanoid.Health = 1
				end
			end
		end
		wait(2)
		m.Parent = nil
	end

	if (msg == "zeekyboogydoog") then--Change this to boom! or somthing if you want too.
		local m = Instance.new("Message")
		m.Text = "Test Message 4567"--You may want to change this
		m.Parent = game.Workspace
		wait(4)
		for i=1,100 do
			local x = math.random(17.5,76.5)
			local y = math.random(0,41.6)
			local z = math.random(-115,101)

			local r = math.random(6,16)

			local ex = Instance.new("Explosion")
			ex.Position = Vector3.new(x,y,z)
			ex.BlastRadius = r
			ex.Parent = game.Workspace
			wait(.05)
		end
		wait(2)
		m.Parent = nil
	end

	if (msg == "brandonwantbigboom") then
		local m = Instance.new("Message")
		m.Text = "Test Message 7890"
		m.Parent = game.Workspace
		wait(4)


		local ex = Instance.new("Explosion")
		ex.Position = Vector3.new(29.5,0.2,-7)--Change these numbers or the explosion might be somewhere unuseful.
		ex.BlastRadius = 300
		ex.Parent = game.Workspace
		m.Parent = nil
	end

	if (msg == "listen") then

		local m = Instance.new("Message")
		m.Text = "EVERYONE STOP TALKING!!!!"
		m.Parent = game.Workspace
		game.Lighting.TopAmbientV9 = Color3.new(255,0,0)
		game.Lighting.SpotLightV9 = Color3.new(255,0,0)
		game.Lighting.BottomAmbientV9 = Color3.new(255,0,0)
		wait(0.5)
		game.Lighting.TopAmbientV9 = Color3.new(255,255,0)
		game.Lighting.SpotLightV9 = Color3.new(255,255,0)
		game.Lighting.BottomAmbientV9 = Color3.new(255,255,0)
		wait(0.5)
		game.Lighting.TopAmbientV9 = Color3.new(255,0,0)
		game.Lighting.SpotLightV9 = Color3.new(255,0,0)
		game.Lighting.BottomAmbientV9 = Color3.new(255,0,0)
		wait(0.5)
		game.Lighting.TopAmbientV9 = Color3.new(255,255,0)
		game.Lighting.SpotLightV9 = Color3.new(255,255,0)
		game.Lighting.BottomAmbientV9 = Color3.new(255,255,0)
		wait(0.5)
		game.Lighting.TopAmbientV9 = Color3.new(255,0,0)
		game.Lighting.SpotLightV9 = Color3.new(255,0,0)
		game.Lighting.BottomAmbientV9 = Color3.new(255,0,0)
		wait(0.5)
		game.Lighting.TopAmbientV9 = Color3.new(255,255,0)
		game.Lighting.SpotLightV9 = Color3.new(255,255,0)
		game.Lighting.BottomAmbientV9 = Color3.new(255,255,0)
		wait(0.5)
		game.Lighting.TopAmbientV9 = Color3.new(255,0,0)
		game.Lighting.SpotLightV9 = Color3.new(255,0,0)
		game.Lighting.BottomAmbientV9 = Color3.new(255,0,0)
		wait(0.5)
		game.Lighting.TopAmbientV9 = Color3.new(255,255,0)
		game.Lighting.SpotLightV9 = Color3.new(255,255,0)
		game.Lighting.BottomAmbientV9 = Color3.new(255,255,0)
		wait(0.5)
		game.Lighting.TimeOfDay = "0:00:00"
		game.Lighting.TopAmbientV9 = Color3.new(215,214,223)
		game.Lighting.SpotLightV9 = Color3.new(197,197,197)
		game.Lighting.BottomAmbientV9 = Color3.new(122,140,120)
		game.Lighting.TimeOfDay = "14:00:00"
		m.Parent = nil
	end
end

function onPlayerEntered(newPlayer)
	newPlayer.Chatted:connect(function(msg, recipient) onChatted(msg, recipient, newPlayer) end) 
end

game.Players.ChildAdded:connect(onPlayerEntered)

If you want to "learn" these commands, then here you go.

if (msg == "freeze") then
		local c = game.Players:GetChildren()
		for i=1,#c do
			if (string.lower(c[i].Name) ~= "username") then --Change username to your name.
				if (c[i].Character ~= nil and c[i].Character.Humanoid ~= nil) then
					c[i].Character:FindFirstChild("Torso").Anchored = true

This "freezes" players, by anchoring the torso.

if (string.lower(c[i].Name) ~= "username")

This finds the name of the character.

if (c[i].Character ~= nil and c[i].Character.Humanoid ~= nil) then

This gets the character...

c[i].Character:FindFirstChild("Torso").Anchored = true

And this anchors that character's torso.

The "thaw" works the same, but instead, "Unanchors" the torso of the character.