apple2a/examples/stars.bas
2018-08-06 01:05:24 -07:00

53 lines
935 B
QBasic

10 GR
20 TS = 40
30 DIM DX(9),DY(9),C(9),X(9),Y(9),T(9)
1000 DX(0) = 12
1005 DY(0) = 15
1010 C(0) = 6
1015 T(0) = 10
1100 DX(1) = 19
1105 DY(1) = 0
1110 C(1) = 5
1115 T(1) = 9
1200 DX(2) = -19
1205 DY(2) = -1
1210 C(2) = 9
1215 T(2) = 9
1300 DX(3) = -19
1305 DY(3) = 3
1310 C(3) = 1
1315 T(3) = 32
1400 DX(4) = -1
1405 DY(4) = 19
1410 C(4) = 7
1415 T(4) = 27
1500 DX(5) = -12
1505 DY(5) = -15
1510 C(5) = 12
1515 T(5) = 3
1600 DX(6) = -19
1605 DY(6) = -2
1610 C(6) = 7
1615 T(6) = 18
1700 DX(7) = 17
1705 DY(7) = 9
1710 C(7) = 13
1715 T(7) = 7
1800 DX(8) = -19
1805 DY(8) = 1
1810 C(8) = 10
1815 T(8) = 5
1900 DX(9) = 18
1905 DY(9) = 8
1910 C(9) = 1
1915 T(9) = 9
2200 I = 0
2210 OX = X(I) : OY = Y(I)
2220 X(I) = 20 + DX(I) * T(I) / 40
2230 Y(I) = 20 + DY(I) * T(I) / 40
2235 T(I) = T(I) + 1 : IF T(I) = TS THEN T(I) = 0
2240 COLOR=0 : PLOT OX, OY
2250 COLOR=C(I) : PLOT X(I), Y(I)
2260 I = I + 1 : IF I < 10 GOTO 2210
2300 GOTO 2200