10 REM CC00.ECB  was ...  <#>.ECB
   15 DIM S(960)
   20 LET S=52224: REM ...Start of screen at CC00H -1
   22 LET B=1,E=60,F=62
   25 LET S0=7: REM ...Inverse video space
   30 FOR Y=0 TO 896 STEP 64
   40   FOR X=1 TO 64
   50     LET S(Y+X)=S,S=S+1
   60   NEXT X
   70 NEXT Y
  100 PRINT "&K"
  110 LET W=4,X=W+1,Y=X+1,Z=Y+1
  120 IF W>64 THEN  LET W=1
  130 IF X>64 THEN  LET X=1
  140 IF Y>64 THEN  LET Y=1
  150 IF Z>64 THEN  LET Z=1
  160 IF Z=1 THEN  LET A=A+64,B=B+1
  170 IF A>896 THEN  LET A=0
  200 POKE S(A+W),32: POKE S(A+X),E
  210 POKE S(A+Y),B: POKE S(A+Z),F
  220 LET W=W+1,X=X+1,Y=Y+1,Z=Z+1
  230 GOTO 120
 1000 END