-- Functions
function dig()
 turtle.dig()
 turtle.turnLeft()
 turtle.dig()
 turtle.turnRight()
 turtle.turnRight()
 turtle.dig()
 turtle.turnLeft()
end

-- Main Script
shell.run("refuel 10")
for i = 1, 100 do
 dig()
 turtle.digUp()
 turtle.up()
 dig()
 turtle.down()
 turtle.digDown()
 turtle.down()
 dig()
 turtle.up()
 turtle.forward()
end