10 DIMA(15)
20 FORI=0TO14
30 LETA(I)=I*2
40 NEXTI
50 FORI=0TO14
60 GOSUB100
70 NEXTI
80 IFZ>0THEN160
90 PRINT"Vectors working."
95 STOP
100 IFA(I)=I*2THEN150
120 Z=1
150 RETURN
160 PRINT"Vectors not working."
170 END