GPSa905

if posx == nil then posx = 1 end
if posy == nil then posy = 0 end

if fieldx == nil then fieldx = 9 end
if fieldy == nil then fieldy = 9 end

if wait == nil then wait = 5 end
if waitafter == nil then waitafter = true end

function coord()
print("Position: "..posx.." / "..posy)
end

function iposx()
posx = posx + 1
end

function iposy()
posy = posy + 1
end

function dposx()
posx = posx - 1
end

function dposy()
posy = posy - 1
end

function mine()
    print("doing stuff here")
end

function move(dx, dy)
coord()
    moveDirX(posx, dx)
    moveDirY(posy, dy)
coord()
end

function moveDirX(ax, dx)
    if ax == 0 then step(dx, 0) else
        delta = ax-dx
        step(delta, 0)
    end
end

function moveDirY(ay, dy)
    if ay == 0 then step(dy, 1) else
        delta = ay-dy
        step(delta, 1)
    end
end

function betrag(zahl1)
    if zahl1 < 0 then return zahl1 * -1
    else return zahl1
    end
end

function step(count, axis)
    if axis == 0 then
        if count > 0 then
            moveLeft(betrag(count))
            return true
        elseif count < 0 then
            moveRight(betrag(count))
            return true
        end
    elseif axis == 1 then
        if count > 0 then
            moveForward(betrag(count))
            return true
        elseif count < 0 then
            moveBack(betrag(count))
            return true
        end
    end

end

function moveRight(ci)
    turtle.turnRight(1)
        for i=1, ci do
            print("Moving right. New: "..(posx+1).." / "..posy)
            if not turtle.detect() then
                turtle.forward()
                iposx()
            else print("I crashed right!")
            end
        end
    turtle.turnLeft(1)
end

function moveLeft(ci)
    turtle.turnLeft(1)
        for i=1, ci do
            print("Moving left. New: "..(posx-1).." / "..posy)
            if not turtle.detect() then
                turtle.forward()
                dposx()
            else print("I crashed left!")
            end
        end
    turtle.turnRight(1)
end

function moveForward(ci)
    for i=1, ci do
        print("Moving forward. New: "..posx.." / "..(posy+1))
        if not turtle.detect() then
            turtle.forward()
            iposy()
        else print("I crashed forward!")
        end
    end
end

function moveBack(ci)
    turn180()
    for i=1, ci do
        print("Moving back. New: "..posx.." / "..(posy-1))
        if not turtle.detect() then
            turtle.forward()
            dposy()
        else print("I crashed backward!")
        end
    end
    turn180()
end

function turn180()
turtle.turnRight()
turtle.turnRight()
end


if not waitafter then sleep(wait) end

move(1,1)
move(1,2)
move(2,2)
if waitafter then sleep(wait) end