function turtleMove()
 turtle.dig()
 turtle.forward()
 turtle.digUp()
 turtle.digDown()
end

while true do
 for i = 1,20 do
  turtleMove()
 end
 turtle.turnRight()

 for i = 1,3 do
  turtleMove()
 end
 turtle.turnRight()
 for i = 1,20 do
  turtleMove()
 end
 turtle.turnRight()
 for i = 1,2 do
  turtleMove()
 end
 for i = 1,2 do
  turtle.turnRight()
 end
 turtle.forward()
 turtle.forward()
 for i = 1,3 do
  turtleMove()
 end
 turtle.turnLeft()
end