Computer Craft Castle Wall (Minecolonies)

function placeBlock(n) -- Place block below, move forward
    for i = 1,n do
        turtle.placeDown()
        turtle.forward()
    end
end
function turnAround() -- 180 deg turn
    turtle.turnLeft()
    turtle.turnLeft()
end
function backUp(n) -- Move back n times
    for i = 1,n do
        turtle.back()
    end
end
function forward(n) --  Move forward n times
    for i = 1,n do
        turtle.forward()
    end
end
function down(n) -- Move down n times
    for i = 1,n do
        turtle.down()
    end
end
function planks()
    turtle.select(1) -- Wood Plank: 16 per section
    placeBlock(6) -- Place 6 wood planks
    for i = 1,2 do -- Moves to second row
        turtle.turnLeft()
        turtle.forward()
    end
    placeBlock(6) -- Places second plank row
end
function cobblestone()
    turtle.select(2) -- Cobblestone: 18 per section
    turtle.up() -- Up and around to place new row on top
    turnAround()
    placeBlock(6) -- Uses place/forward pattern, loop not possible
    turtle.up()
    turnAround()
    turtle.forward() -- Extra forward to account for place/forward pattern
    placeBlock(6)
    turtle.up()
    turnAround()
    placeBlock(6)
end
function plankEdge()
    turtle.turnLeft() -- Move up and left for spider blocker
    turtle.forward()
    turtle.turnLeft()
    turtle.up()
    turtle.select(1) -- Wood Plank: 16 per section
    for i = 1,4 do -- Old forward/place pattern (works here)
        turtle.forward()
        turtle.placeDown()
    end
end
function pillars()
    turtle.select(3) -- Wood: 12 per section
    turtle.forward()
    down(5) -- Start building from bottom
    for i = 1,6 do
        turtle.up()
        turtle.placeDown()
    end
    backUp(2) -- Get to spot to place torch
    turtle.down()
    turtle.select(4) -- Torch: 2 per section
    turtle.place()
    turtle.up() -- Move to next pillar
    forward(3)
    down(6)
    turtle.select(3) -- Wood: 12 per section
    for i = 1,6 do
        turtle.up()
        turtle.placeDown()
    end
    forward(2) -- Move to second torch
    turnAround()
    turtle.down()
    turtle.select(4) -- Torch: 4 per section
    turtle.place() -- Place 2nd torch
end
function ladders()
    turtle.turnRight() -- Move to position for ladders
    forward(3)
    turtle.turnLeft()
    forward(2)
    turtle.turnLeft()
    down(2)
    turtle.select(5) -- Ladder: 3 per section
    for i = 1,3 do -- Place ladders
        turtle.place()
        turtle.down()
    end
end
function moveNext()
    turtle.up() -- Move into position for next section (perfect fit!)
    turtle.turnRight()
    forward(5)
    turtle.turnLeft()
    turtle.forward()
    turtle.turnRight()
    turtle.forward()
end

--[[Computer Craft Castle Wall (Minecolonies)(In Progress)]]--
--[[Start turtle one space off ground, disk drive to right]]--
--[[Remove disk drive after starting if using]]--
planks()
turtle.forward()
cobblestone()
plankEdge()
pillars()
ladders()
moveNext()