Heartbeat (Event)

Heartbeat ( double step )
Description	This event fires every frame in which Lua is ran. The step argument tells you how much time has passed between frames. This is usually around 1/30th of a second.
Member of:	RunService

The following code would be put in a Script. The script can be placed in the Workspace.

local service = game:GetService('RunService')
local variable2 = 5
wait(5)
service.Heartbeat:connect(function(variable1)
    if variable2 > 0 then
        variable2 = variable2 - 1
        print("The function returned: "..variable1)
    end
end)

The function returned: 0.033333335071802 The function returned: 0.033333335071802 The function returned: 0.033333335071802 The function returned: 0.033333335071802

The function returned: 0.033333335071802