platform

local args = {...}
if args[1] and args[2] then else
  print"Usage:"
  print"roofer numLines numTurn"
  return
end
args[1]=tonumber(args[1])-1
args[2]=tonumber(args[2])-1
turtle.select(1)
local right
for i=1,args[1] do
  for i=1,args[2] do
    if turtle.getItemCount(turtle.getSelectedSlot())==0 then
      turtle.select(turtle.getSelectedSlot()+1)
      print"ohhhh NOOOOO!!!!"
    end
    turtle.placeDown()
    turtle.forward()
  end
  if not right then
    turtle.turnLeft()
    turtle.forward()
    turtle.turnLeft()
  else
    turtle.turnRight()
    turtle.forward()
    turtle.turnRight()
  end
  right=not right
end