| 1 REM "DIAMOND from 101 BASIC games" | |
| 2 REM "Ported to Stefan's BASIC in 2021" | |
| 3 REM | |
| 4 PRINT "FOR A PRETTY DIAMOND PATTERN," | |
| 5 INPUT "TYPE IN AN ODD NUMBER BETWEEN 5 AND 21";R:PRINT | |
| 6 Q=INT(60/R):A$="CC" | |
| 8 FOR L=1 TO Q | |
| 10 X=1:Y=R:Z=2 | |
| 20 FOR N=X TO Y STEP Z | |
| 25 TAB((R-N)/2) | |
| 28 FOR M=1 TO Q | |
| 29 C=1 | |
| 30 FOR A=1 TO N | |
| 32 IF C>LEN(A$) THEN PRINT "!";: CONT | |
| 34 PRINT A$(C,C); | |
| 36 C=C+1 | |
| 50 NEXT | |
| 53 IF M=Q THEN BREAK | |
| 55 TAB(R*M+(R-N)/2) | |
| 56 NEXT | |
| 60 PRINT | |
| 70 NEXT | |
| 83 IF X<>1 THEN CONT | |
| 85 X=R-2:Y=1:Z=-2 | |
| 90 GOTO 20 | |
| 95 NEXT | |
| 99 END | |