I was 11 years old.

BOUNCE.BAS

' *This is the FIRST succesful "Bounce" program. This is THE original (other *
' *than the lines you're reading) so please make NO changes to the program.*
1 SCREEN 11
2 CLS
5 FOR z = 0 TO 20 STEP 20
10 CIRCLE (x, y), z
15 NEXT z
20 x = x + 4
21 y = y + 4
23 IF y > 432 THEN 32
25 IF x > 588 THEN 122
27 GOTO 2
32 CLS
35 FOR z = 0 TO 20 STEP 20
40 CIRCLE (x, y), z
45 NEXT z
50 x = x + 4
51 y = y - 4
53 IF y < 48 THEN 1
55 IF x > 588 THEN 62
57 GOTO 32
62 CLS
65 FOR z = 0 TO 20 STEP 20
70 CIRCLE (x, y), z
75 NEXT z
80 x = x - 4
81 y = y - 4
83 IF y < 48 THEN 92
85 IF x < 48 THEN 32
87 GOTO 62
92 CLS
95 FOR z = 0 TO 20 STEP 20
100 CIRCLE (x, y), z
105 NEXT z
110 x = x - 4
111 y = y + 4
113 IF x < 48 THEN 2
115 IF y > 432 THEN 62
117 GOTO 92
122 CLS
125 FOR z = 0 TO 20 STEP 20
130 CIRCLE (x, y), z
135 NEXT z
140 x = x - 4
141 y = y + 4
143 IF x < 48 THEN 1
145 IF y > 432 THEN 62
147 GOTO 122