r = 40;
draw_set_color(c_white);
draw_circle(x, y, r + 2, 1);
draw_circle(x, y, r + 3, 1);
draw_set_color(c_lime);
for (i = 0; i < 10; i += 1)
{
    draw_set_alpha((i + 1) / 10);
    draw_line_width(x + (sin((siner + i) / 10) * r), y + (cos((siner + i) / 10) * r), x, y, 3);
}
siner += 1;
draw_sprite_ext(spr_dogradar, 0, x + radardogx, y + radardogy, 1, 1, 0, c_white, radardogalpha);
radardogalpha -= 0.05;
if (radardogalpha < -0.6)
{
    radardogalpha = 1;
    radardogx = random(40) - 30;
    radardogy = random(40) - 30;
}