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i,j,k,x,y,o,N;
main(){float z[1760],a
#define R(t,x,y) f=x;x-=t*y\
;y+=t*f;f=(3-x*x-y*y)/2;x*=f;y*=f;
=0,e=1,c=1,d=0,f,g,h,G,H,A,t,D;char
b[1760];for(;;){memset(b,32,1760);g=0,
h=1;memset(z,0,7040);for(j=0;j<90;j++){
G=0,H=1;for(i=0;i<314;i++){A=h+2,D=1/(G*
A*a+g*e+5);t=G*A *e-g*a;x=40+30*D
*(H*A*d-t*c);y= 12+15*D*(H*A*c+
t*d);o=x+80*y;N =8*((g*a-G*h*e)
*d-G*h*a-g*e-H*h *c);if(22>y&&y>
0&&x>0&&80>x&&D>z[o]){z[o]=D;b[o]=(N>0
?N:0)[".,-~:;=!*#$@"];}R(.02,H,G);}R(
.07,h,g);}for(k=0;1761>k;k++)putchar
(k%80?b[k]:10);R(.04,e,a);R(.02,d,
c);usleep(15000);printf('\n'+(
" donut.c! \x1b[23A"));}}
/*3D-spinning-donut*/
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