Start Screen string question

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BlueWolf

I am doing a little start screen for my project(Like the ones featured in some of the blitz3d samples)

I have tried the following code

Open in online IDE

gfx$=Input("Use Windowed Mode?")

	If Left$(Lower$(gfx$),1)=y
		Graphics3D 800,600,0,3
	ElseIf Left$(Lower$(gfx$),1)=n
		Graphics3D 1200,1000,0,1
	EndIf	 	
in$=Input("How Many Balls?")
Print "Okay there will be"+in$+"balls"

,the user input has no effects on the screen mode.
I can't quite figure out what I am doing wrong here so any help would be appreciated.