RosettaCodeData/Task/Animate-a-pendulum/Applesoft-BASIC/animate-a-pendulum.basic

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0 ON NOT T GOTO 9: FOR Q = 0 TO T STEP 0:BX = PX + L * S * SIN (F):BY = PY - L * S * COS (F): HCOLOR= 0: FOR I = 0 TO N(P): DRAW T + (I = N(P)) AT X(P,I),Y(P,I): NEXT I:N(P) = 0: HCOLOR= C
1 FOR X = PX TO BX STEP (BX - PX) / Z:Y = PY + (X - PX) * (BY - PY) / (BX - PX): DRAW T AT X,Y:X(P,N(P)) = X:Y(P,N(P)) = Y:N(P) = N(P) + 1: NEXT X
2 HCOLOR= T: DRAW B AT BX,BY:X(P,N(P)) = BX:Y(P,N(P)) = BY:A = PEEK (R + P):P = NOT P: POKE U,W + W * P:A = G * SIN (F) / L / H:V = V + A / Z:F = F + V: NEXT Q
9 DIM N(1),X(1,11),Y(1,11): FOR P = 32 TO 64 STEP 32: POKE 230,P: HCOLOR= 0: HPLOT 0,0: CALL 62454: NEXT :R = 49236:P = ( PEEK (R) + PEEK (49234) + PEEK (49239) + PEEK (49232)) * 0 + 1
10 S$ = CHR$ (2) + CHR$ (0) + CHR$ (6) + CHR$ (0) + CHR$ (8) + CHR$ (0) + "-" + CHR$ (0) + ".%'?>..%" + CHR$ (0): PRINT MID$ ( STR$ ( FRE (0)) + S$,1,0);: POKE 236, PEEK (131): POKE 237, PEEK (132)
15 S = PEEK (236) + PEEK (237) * 256: POKE 232, PEEK (S + 1): POKE 233, PEEK (S + 2): SCALE= 1: ROT= 0
20 T = 1
25 F = 3.1415926535 / 2: REM THETA
30 G = 9.81
35 L = 0.5
40 V = 0: REM SPEED
45 PX = 140
50 PY = 80
55 S = 20
60 Z = 10
65 C = 3
70 B = 2
75 U = 230
80 W = 32
85 H = 50
90 GOTO