Dig Program Help Please

while true do --#do everything inside this loop forever
  for i = 1, 64 do --#do everything inside this loop 64 times
    turtle.dig() --#break the block in front of the turtle
  end --#end of "do everything inside this loop 64 times"
  turtle.turnLeft() --#turn the turtle left
  turtle.drop( 64 ) --#drop 64 of whatever is in the currently selected slot (default: 1)
  turtle.turnRight() --#turn the turtle right
end --#end of "do everything inside this loop forever"