side = choose(0, 1);
if (side == 0)
{
    y = global.idealborder[2] - sprite_height - 5;
    vspeed = 9 + random(0.5);
}
if (side == 1)
{
    vspeed = -9 - random(0.5);
    y = global.idealborder[3] + 5;
}
hspeed = random(0.5) * choose(1, -1);