Help making a turtle loop

I need help making a turtle run on an infinite loop without player interference. I'm trying to make an automatic sugarcane farm with the turtle (I tried pistons already but most of the drops landed in the dirt) and I want it to basically just keep running the same path but I don't want to have to keep entering a command. If this is possible I could really use some help.

while true do
–Fun stuffs here
end

This should be in ask a pro.

os.pullEvent = os.pullEventRaw

For no termination of any "human"