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REMĀĘĆĞ$Č*Ēĉ!ăě-ĕ'ď
MODE1:VDU5
FORN=8TO247:FORM=0TO319
X=0:Y=-.1:Z=3:U=(M-159.5)/160:V=(N-127.5)/160:W=1/SQR(U*U+V*V+1):U=U*W:V=V*W:I=SGNU:G=1
E=X-I:F=Y-I:P=U*E+V*F-W*Z:D=P*P-E*E-F*F-Z*Z+1:IFD>0T=-P-SQRD:IFT>0X=X+T*U:Y=Y+T*V:Z=Z-T*W:E=X-I:F=Y-I:G=Z:P=2*(U*E+V*F-W*G):U=U-P*E:V=V-P*F:W=W+P*G:I=-I:GOTO50
IFV<0P=(Y+2)/V:V=-V*((INT(X-U*P)+INT(Z-W*P)AND1)/2+.3)+.2
GCOL0,3-(48*SQRV+?(PAGE+5+M MOD4+N MOD4*4)/3)DIV16
PLOT69,4*M,4*N:NEXT,
#bbcmicrobot