How can i make a custom animated background for a in-game menu?

put the code to draw and the code to check if the button is pressed in the same loop. i.e. repeat gcls for i=1 to 20 rnd1=rnd(400) rnd2=rnd(240) gfill rnd1,rnd2,rnd1+10,rnd2+10,rgb(20,rnd(100)+155,40) next gputchr 20,20,"Le Game!",rgb(20,20,235), vsync until button()==#a

Syntax Error 0:6

Syntax Error in 0:7

Oh Sorry cause i did not understand it in the first place but now i get it... Like this?

Thanks for the BG Screen! Its Awesome! I will add you to my Game Credits Plus you´ve just earned yourself a miiverse follower! (Me!) I will give you the game key when its complete. =0w0=

just to say, i didn't test the code b/c i was at school. thanks!

Don´t Worry Its an Awesome BG! I Don´t even know the first thing about scroll backgrounds.