Basic mouse hover support and sprite auto work more properly

uxn-tests/sprites.tal

@@ -1,23 +1,47 @@
 |00 @System/vector $2 &expansion $2 &wst $1 &rst $1 &metadata $2 &r $2 &g $2 &b $2 &debug $1 &state $1
 |20 @Screen/vector $2 &width $2 &height $2 &auto $2 &x $2 &y $2 &addr $2 &pixel $1 &sprite $1
 
-|100
+|0000
+@counter $2
+
+|0100
 @on-reset ( -> )
 	set-theme
-	#0020 .Screen/x DEO2
+	;on-screen .Screen/vector DEO2
+	#0000 .counter STZ2
+	( draw-sprite )	
+	BRK
+
+@on-screen ( -> )
+	clear-screen
+	draw-sprite	
+	BRK
+
+@draw-sprite ( -> )
+	#0020 .counter LDZ2 ADD2 .Screen/x DEO2
 	#0040 .Screen/y DEO2
-	( ;sprite-icn .Screen/addr DEO2 )
-	( #01 .Screen/sprite DEO )
-	#00 .Screen/auto DEO
+	
+	#21 .Screen/auto DEO
 	;sprite2-icn .Screen/addr DEO2
 	#c1 .Screen/sprite DEO
-	BRK
+
+	.counter LDZ2 INC2 .counter STZ2
+	JMP2r
 
 @set-theme ( -- )
 	#f07f .System/r DEO2
 	#f0d6 .System/g DEO2
 	#f0b2 .System/b DEO2
 	JMP2r
+
+
+@clear-screen ( -- )
+	#0000 .Screen/x DEO2
+	#0000 .Screen/y DEO2
+	#00 .Screen/auto DEO
+	#80 .Screen/pixel DEO
+	#c0 .Screen/pixel DEO
+	JMP2r
 	
 @sprite-icn
 	00 66 ff ff ff 7e 3c 18