local tArgs = { ... }
local nCount = tArgs[1]
 
if not nCount then
        print("Usage: clear <count>")
return
end
 
if nCount==0 then
        print("Arg 1, <count> must be greater than zero!")
return
end
 
for n=1,nCount do
  if turtle.detect() then
    turtle.dig()
    turtle.forward()
  else
    turtle.forward()
  end
end