The main or first part of a three part triggered background for use on stage in theatrical or musical productions of stories like the Little Mermaid. When facing the stage place this center stage facing the audience. Scale as necessary to fill the height then slide parts B & C to each side. Keep them centered on the stage or curtains may bisect the backdrops ruining the effect. Triggers for Set/ Backdrops 1 - 12 are FB1, FF1, DT1, PYW1, SS1, PYWR1, US1, PUS1, LP1, KG1, HE1 and HE10. To render them off or invisible type B0 that is B Zero All three parts show a complete image using these triggers. Try the product if it does not operate as described contact me; use the links above to shop for others or create your own.