diff --git a/MATRIX b/MATRIX
index ecb5c5e..18d2caf 100644
--- a/MATRIX
+++ b/MATRIX
@@ -1,35 +1,44 @@
- 1 REM THE MATRIX
- 2 REM BY NEIL KANDALGAONKAR <NEILK@NEILK.NET>
- 3 REM https://github.com/neilk/apple-ii-matrix/
- 5 FOR I = 1 TO 30: PRINT " ": NEXT I
- 10 DIM K(3,2)
- 11 H = 0
- 12 V = 1
- 13 F = 2
- 15 FOR C = 0 TO 3
- 16 GOSUB 50
- 17 NEXT C
- 20 FOR C = 0 TO 3
- 30 R =  INT ( RND (1) * 20)
- 31 IF R = 1 THEN  GOSUB 50
- 32 IF R >< 1 THEN  GOSUB 100
- 35 NEXT C
- 39 GOTO 20
- 50 REM  RESET
- 51 K(C,H) =  INT ( RND (1) * 40) + 1
- 52 K(C,V) = 0
- 53 K(C,F) =  INT ( RND (1) * 2)
- 99  RETURN
- 100 REM  DRAW
- 101 K(C,V) = K(C,V) + 1
- 102 IF K(C,V) > 22 THEN  RETURN
- 103 VTAB K(C,V): HTAB K(C,H)
- 110 IF K(C,F) = 1 THEN  GOSUB 120
- 111 IF K(C,F) = 0 THEN  GOSUB 130
- 119 RETURN
- 120 REM  DRAW CHAR
- 121 PRINT  CHR$ ( INT ( RND (1) * 96 + 32))
- 122 RETURN
- 130 REM  ERASE CHAR
- 131 PRINT " "
- 132 RETURN
+1 REM  THE MATRIX
+2 REM  BY NEIL KANDALGAONKAR <neilk@neilk.net>
+3 REM  https://github.com/neilk/apple-ii-matrix/
+4 REM  CLEAR SCREEN
+5 FOR I = 1 TO 30: PRINT: NEXT I
+6 REM  USE ALL 24 LINES
+7 POKE 35, 25
+9 REM  SET UP THREE CURSORS
+10 DIM K(3,2)
+11 REM  CONSTANTS FOR ARRAY INDICES. 
+12 REM  HORIZONTAL, VERTICAL, DRAW/ERASE
+13 H = 0: V = 1: F = 2
+14 REM RESET ALL CURSORS
+15 FOR C = 0 TO 3
+16 GOSUB 50
+17 NEXT C
+20 REM  MAIN LOOP
+21 REM  DRAW CURSORS FOREVER. 5% CHANCE OF RESET
+30 FOR C = 0 TO 3
+31 R =  INT ( RND (1) * 20)
+32 IF R = 1 THEN  GOSUB 50
+33 IF R >< 1 THEN  GOSUB 100
+35 NEXT C
+39 GOTO 30
+50 REM  RESET A CURSOR
+51 REM  AT A RANDOM SPOT AT THE TOP OF THE SCREEN
+52 REM  50-50 CHANCE OF DRAWING OR ERASING
+53 K(C,H) =  INT ( RND (1) * 40) + 1
+54 K(C,V) = 0
+55 K(C,F) =  INT ( RND (1) * 2)
+59  RETURN
+100 REM  ADVANCE CURSOR AND DRAW SOMETHING
+101 K(C,V) = K(C,V) + 1
+102 IF K(C,V) > 24 THEN  RETURN
+103 VTAB K(C,V): HTAB K(C,H)
+110 IF K(C,F) = 1 THEN  GOSUB 120
+111 IF K(C,F) = 0 THEN  GOSUB 130
+119 RETURN
+120 REM  RANDOM CHAR
+121 PRINT  CHR$ ( INT ( RND (1) * 96 + 32));
+122 RETURN
+130 REM  ERASE CHAR
+131 PRINT " ";
+132 RETURN