Gaster Blaster Trouble

1

I need help trying to make a Gaster Blaster, a laser-firing device used by the enemy my friend really Likes Undertale and I wanna do something nice for him code is here: https://studio.code.org/projects/gamelab/8yrF_oSztTC8E_yGldcrskbEcDsVbvYtn9bTjAqeRfg/edit