Error

Hello all,
i have a Problem with my computer.
I become the following Error:

startup: 4: Too long without yielding

Thats my code:

local rs = redstone
while true do
if rs.getInput("right") == true then
sleep(5)
rs.setOutput("left", true)
sleep(2)
rs.setOutput("left", false)
end
end

Sorry for that bad englisch. I Speak German.

Your script must yield ("pause", basically) at least once every ten seconds or ComputerCraft will terminate it.

The usual way to do this is to call os.pullEvent(), or to call a function that does it for you, like sleep(). Your script does call sleep(), but only if there is a redstone signal on the right - the rest of the time your loop runs flat-out without ever yielding.

We can have it yield until redstone state changes occur by waiting for redstone events:

while true do
	if rs.getInput("right") then
		sleep(5)
		rs.setOutput("left", true)
		sleep(2)
		rs.setOutput("left", false)
	end
	
	while not rs.getInput("right") do os.pullEvent("redstone") end  -- Yield until redstone turns on again.
end

Note that "rs" is already equal to "redstone" by default. You don't need to manually assign it.