Mele Turtle - Redstone controlled

while true do
while redstone.getInput("left") do
turtle.attack()
if turtle.getItemCount(13)>0 then
for vSlot = 16, 1, -1 do
turtle.select(vSlot)
turtle.dropDown()
print("Empty slot" .. turtle.getSelectedSlot())
turtle.select(turtle.getSelectedSlot()+1)
term.clear()
term.setCursorPos(1,1)
sleep(0.1)
end
end