6 REM
7 REM DEMO2 - INTERFERENZ
8 REM (C)1985 BY A.DEL PINO
9 REM
10 &CLEAR
20 FORI=0TO799STEP7
22 PRINT".";
30 &LINE400,0,I,552
35 &LINE400,552,I,0
40 NEXT
50 FORI=0TO552STEP9
55 PRINT".";
60 &INVTEXT356,I,"INTERFERENZ"
70 NEXT
80 &PRINT:END