turtle platform

if not turtle then return print "LOL, how are you going to use this program without a turtle?!?" end


print "how long platform?"
longplat = read()
print "how wide platform?"
wideplat = read()
print "what way to turn first? ( right - left )"
firstturn = read()
print "how many layers?"
layers = read()


first = true


if firstturn == "right" or firstturn == "left" then nextturn = firstturn
else return print "Error with first turn!"
end


function gotoStart()
    longplat2 = longplat - 2
    wideplat2 = wideplat - 2
    turtle.turnLeft()
    turtle.turnLeft()
    for n1 = 0,longplat2 do
        turtle.forward()
    end
    if nextturn == "left" then
        turtle.turnLeft()
    else turtle.turnRight()
    end
    for n1 = 0,wideplat2 do
        turtle.forward()
    end
    if nextturn == "left" then
        turtle.turnLeft()
    else turtle.turnRight()
    end
end


function layer()

    while true do
        if first == true then
            first = false
            longplat1 = longplat
            wideplat1 = wideplat
            longplat1 = longplat1 - 1
        end
        wideplat1 = wideplat1 - 1
        for n1 = 1,longplat1 do
            turtle.placeDown()
            turtle.forward()
            turtle.placeDown()
        end
        if wideplat1 == 0 then break end
        if nextturn == "left" then
            nextturn = "right"
            turtle.turnLeft()
            turtle.forward()
            turtle.turnLeft()
        elseif nextturn == "right" then
            nextturn = "left"
            turtle.turnRight()
            turtle.forward()
            turtle.turnRight()
        end
        turtle.placeDown()
    end


end


for n2 = 1,layers do
turtle.up()
layer()
gotoStart()
first = true
end
turtle.down()