if (!init)
{
    if (side == 0)
        side = randomsign();
    targetx = xstart;
    xstart += (random_range(20, 10) * side);
    init = true;
}
scr_depth(-20);
if (image_alpha < 1)
    image_alpha = scr_movetowards(image_alpha, 1, 0.25);
if (timer < lifetime)
{
    timer++;
    height = lerp(0, target_height, scr_ease_in(timer / lifetime, 2));
    x = lerp(xstart, targetx, timer / lifetime);
}
else
{
    image_speed = 0;
    image_index = 0;
}