Crank

term.clear()
term.setCursorPos()
print("I will crank as long as I have redstone power")
print("on my TOP BACK or BOTTOM")
print("-Place a leaver or torch to tell me to crank")

while true do
 if rs.getInput("bottom") or rs.getInput("top") or rs.getInput("back") then
  turtle.attack()
  sleep(0.2)
 end
end