Butler

-- Global variables
x = turtle.getItemCount(1)
-- Global variables^

-- Main function
function enterShop()
        turtle.down()
        turtle.down()
        turtle.turnRight()
        turtle.forward()
        turtle.turnRight()
        turtle.forward()
        turtle.forward()
        turtle.turnRight()
        turtle.forward()
        turtle.forward()
        turtle.turnLeft()
        turtle.up()
        turtle.up()
end

function getBack()
        turtle.down()
        turtle.down()
        turtle.turnLeft()
        turtle.forward()
        turtle.forward()
        turtle.turnLeft()
        turtle.forward()
        turtle.forward()
        turtle.turnLeft()
        turtle.forward()
        turtle.turnRight()
        turtle.up()
        turtle.up()
end

function beNice()
        turtle.drop(1)
end

function getSnack()
        turtle.turnLeft()
        turtle.suck()
        turtle.drop(turtle.getItemCount(1) - 1)
        turtle.turnRight()
end

function listen()
        while true do
                if redstone.getInput("top") == true then
                        go()
                else os.sleep(0.1)
                end
        end
end

function go()
        enterShop()
        os.sleep(2)
        beNice()
        getBack()
        getSnack()
end
-- Main function^

-- Execute
listen()

-- Execute^