Double click the flag to sync the song To add the health bar to your song, export the Icons sprite, and import it into your song. Next, take the Health Bar costume in the Icons sprite, and make it its own sprite. Make sure its X is 0, and it has the same Y value as the icons themselves. Finally, change the health bar and icons as you please, and add "Broadcast [P1/P2Point]" to each of the "When I receive [P#Pose]" scripts. Put them right before the "Set Costume to [Pose]" block for best results.
This is really just me tryna figure out how to make a health bar system, lol. Instructions on how to add the health bar to your song are found above.
