Mining

robot = require("robot")

while i < 9 do

    for j = 0, 3 do
        robot.forward()
        i = i + 1
    end

    if x % 2 == 0
        robot.turnRight()
        robot.forward()
        robot.turnRight()
    else
        robot.turnLeft()
        robot.forward()
        robot.turnLeft()
    end
    j = 0
end