Turtle - modfarmer

while redstone.getInput("back") do
turtle.attack()
turtle.attack()
turtle.attack()
turtle.attack()
turtle.attack()
turtle.attack()
turtle.attack()
turtle.attack()
turtle.attack()
turtle.attack()
turtle.attack()
turtle.attack()
for i = 1, 16 do
turtle.select(i)
turtle.dropDown()
end
turtle.select(1)
sleep(0.5)
end
print("Starting startup program")
shell.run("startup")