ComputerCraft 3x3 mining turtle code

function initiate()
    turtle.select(1)
    turtle.refuel(3)
    print("Please put 1 stack of coal in the first slot, 1 stack of cobble in the second slot, and 1 stack of torches in the third slot. Then start the program! ")
    while turtle.detect()==false do
        turtle.forward()
    end
end


function CheckFuel()
    if turtle.getFuelLevel() < 500 then
        turtle.refuel(5)
    end
end


function forward()
    turtle.forward()
end


function dig()
    turtle.dig()
end


function digup()
    turtle.digUp()
end


function left()
    turtle.turnLeft()
end


function right()
    turtle.turnRight()
end


function up()
    turtle.up()
end


function down()
    turtle.down()
end

function Hammer()
    dig()
    forward()
    if turtle.detectDown()==false then
        turtle.select(2)
        turtle.placeDown()
    end
    turtle.turnLeft()
    turtle.dig()
    turtle.turnRight()
    turtle.turnRight()
    turtle.dig()
    turtle.turnLeft()
    turtle.digUp()
    turtle.up()
    turtle.turnLeft()
    turtle.dig()
    turtle.turnRight()
    turtle.turnRight()
    turtle.dig()
    turtle.turnLeft()
    turtle.digUp()
    turtle.up()
    turtle.turnLeft()
    turtle.dig()
    turtle.turnRight()
    turtle.turnRight()
    turtle.dig()
    turtle.turnLeft()
    turtle.down()
    turtle.down()
end


function TorchHammer()
    dig()
    forward()
    if turtle.detectDown()==false then
        turtle.select(2)
        turtle.placeDown()
    end
    left()
    dig()
    right()
    right()
    dig()
    left()
    digup()
    up()
    left()
    dig()
    right()
    right()
    dig()
    left()
    digup()
    up()
    left()
    dig()
    right()
    right()
    dig()
    left()
    down()
    turtle.select(3)
    turtle.placeDown()
    turtle.dig()
    turtle.forward()
    turtle.digDown()
    turtle.down()
    if turtle.detectDown()==false then
        turtle.select(2)
        turtle.placeDown()
    end
    turtle.turnLeft()
    turtle.dig()
    turtle.turnRight()
    turtle.turnRight()
    turtle.dig()
    turtle.turnLeft()
    turtle.digUp()
    turtle.up()
    turtle.turnLeft()
    turtle.dig()
    turtle.turnRight()
    turtle.turnRight()
    turtle.dig()
    turtle.turnLeft()
    turtle.digUp()
    turtle.up()
    turtle.turnLeft()
    turtle.dig()
    turtle.turnRight()
    turtle.turnRight()
    turtle.dig()
    turtle.turnLeft()
    turtle.down()
    turtle.down()
end


function excavation()
    TorchHammer()
    Hammer()
    Hammer()
    Hammer()
    Hammer()
    Hammer()
    Hammer()
end



function start()
    initiate()
    while true do
        CheckFuel()
        excavation()
    end
end

start()