OreDetector

ar = peripheral.wrap("right")
pd = peripheral.wrap("top")
WIDTH <const> = 520
HEIGHT <const> = 1000

function getPos()
    return pd.getPlayerPos("StaticShadow")
end

ar.clear()

function drawDot(rotation)
    x = math.floor(WIDTH/360*((360+180-rotation)%360))
    print(x)
    ar.drawItemIconWithId("ind", "minecraft:diamond", x, 250)
end

while true do
    local timer = os.startTimer(.01)
    local event, id
    repeat
        event, id = os.pullEvent("timer")
    until id == timer

    pos = getPos()
    rotation = math.floor(pos.yaw+180)
    drawDot(rotation)
end