Rubber Turtle

local function tapColumn()
  for i=1, x do
    turtle.dig()
    turtle.up()
    turtle.dig()
    turtle.up()
    turtle.dig()
    turtle.down()
    turtle.down()
    turtle.turnLeft()
    leftTurn()
  end
end

local function leftTurn()
    if turtle.detect() == false do
        turtle.forward()
        turtle.turnRight()
    else
    end
end

while true do
    turtle.forward()
    turtle.forward()
    turtle.turnRight()
    tapColumn(38)
    turtle.turnRight()
    turtle.turnRight()
    turtle.back()
    turtle.back()
    turtle.turnRight()
    turtle.select(1)
    turtle.drop(64)
    turtle.select(2)
    turtle.drop(64)
    turtle.select(3)
    turtle.drop(64)
    turtle.select(4)
    turtle.drop(64)
    turtle.turnLeft()
    os.sleep(1800)
end