track1_x += 4;
track2_x += 4;
track3_x += 4;
if (track1_x > (camerax() + camerawidth()))
    track1_x -= 960;
if (track2_x > (camerax() + camerawidth()))
    track2_x -= 960;
if (track3_x > (camerax() + camerawidth()))
    track3_x -= 960;
draw_sprite(spr_sneo_wall_track, 0, track1_x, (cameray() + cameraheight()) - 180);
draw_sprite(spr_sneo_wall_track, 0, track2_x, (cameray() + cameraheight()) - 180);
draw_sprite(spr_sneo_wall_track, 0, track3_x, (cameray() + cameraheight()) - 180);