SCREEN 2
WINDOW (-20, 50)-(20, -25)
REM DEFINE DX/DT=D1=F(T,X,Y,Z)
REM DEFINE DY/DT=D2=F(T,X,Y,Z)
REM DEFINE DZ/DT=D3=F(T,X,Y,Z)
PRINT "D1 = 10 * (Y - x)"
PRINT "D2 = 28 * x - x * Z"
PRINT "D3 = x * Y - (8 / 3) * Z"
d = 100
T1 = 1
T2 = 2
x = 5
Y = 5
Z = 5
N = 19000
FOR T9 = T1 TO T2 STEP d
FOR T = T9 TO T9 + d STEP d / N
D1 = 10 * (Y - x)
D2 = 28 * x - x * Z
D3 = x * Y - (8 / 3) * Z
x = x + D1 * d / N
Y = Y + D2 * d / N
Z = Z + D3 * d / N
PSET (x, Y)
NEXT T
NEXT T9