ChickenSpawn

idleTime=60
updateTime=5

timeHigh=0.1
timeLow=0.1


function FilterChest()
    turtle.suckDown()
    if (turtle.getItemCount(1)>0) then
        if (turtle.compareTo(16)==true) then
            turtle.drop()
        else
            turtle.turnRight()
            turtle.turnRight()
            turtle.drop()
            turtle.turnRight()
            turtle.turnRight()
        end
        FilterChest()
    end
end

function SpawnChicken()
    for i=1,150 do
        redstone.setOutput("top",true)
        os.sleep(timeHigh)
        redstone.setOutput("top",false)
        os.sleep(timeLow)
        print(150-i)
    end
end

--Loop
while true do
    FilterChest()
    for i=0,(idleTime/updateTime),1 do
        if (redstone.getInput("left")==true) then
            SpawnChicken()
            i=idleTime/updateTime
        else
            os.sleep(updateTime)
        end
    end
end