Recently, I stumbled upon one of the most beautifull pieces of source code. It's a really simple flightsimulator, written in C. Nothing special about that. But the source code is completely indented, so it looks like an airplane. Now that's art with a capital A. Here's what it looks like:

#include				     
#include				   
#include				   
#include				  
					  double L ,o ,P
					 ,_=dt,T,Z,D=1,d,
					 s[999],E,h= 8,I,
					 J,K,w[999],M,m,O
					,n[999],j=33e-3,i=
					1E3,r,t, u,v ,W,S=
					74.5,l=221,X=7.26,
					a,B,A=32.2,c, F,H;
					int N,q, C, y,p,U;
				       Window z; char f[52]
				    ; GC k; main(){ Display*e=
 XOpenDisplay( 0); z=RootWindow(e,0); for (XSetForeground(e,k=XCreateGC (e,z,0,0),BlackPixel(e,0))
; scanf("%lf%lf%lf",y +n,w+y, y+s)+1; y ++); XSelectInput(e,z= XCreateSimpleWindow(e,z,0,0,400,400,
0,0,WhitePixel(e,0) ),KeyPressMask); for(XMapWindow(e,z); ; T=sin(O)){ struct timeval G={ 0,dt*1e6}
; K= cos(j); N=1e4; M+= H*_; Z=D*K; F+=_*P; r=E*K; W=cos( O); m=K*W; H=K*T; O+=D*_*F/ K+d/K*E*_; B=
sin(j); a=B*T*D-E*W; XClearWindow(e,z); t=T*E+ D*B*W; j+=d*_*D-_*F*E; P=W*E*B-T*D; for (o+=(I=D*W+E
*T*B,E*d/K *B+v+B/K*F*D)*_; p K)N=1e4; else{ q=W/K *4E2+2e2; C= 2E2+4e2/ K
 *D; N-1E4&& XDrawLine(e ,z,k,N ,U,q,C); N=q; U=C; } ++p; } L+=_* (X*t +P*M+m*l); T=X*X+ l*l+M *M;
  XDrawString(e,z,k ,20,380,f,17); D=v/l*15; i+=(B *l-M*r -X*Z)*_; for(; XPending(e); u *=CS!=N){
				   XEvent z; XNextEvent(e ,&z);
                                       ++*((N=XLookupKeysym
					 (&z.xkey,0))-IT?
					 N-LT? UP-N?& E:&
					 J:& u: &h); --*(
					 DN -N? N-DT ?N==
					 RT?&u: & W:&h:&J
					  ); } m=15*F/l;
					  c+=(I=M/ l,l*H
					  +I*M+a*X)*_; H
					  =A*r+v*X-F*l+(
					  E=.1+X*4.9/l,t
					  =T*m/32-I*T/24
					   )/S; K=F*M+(
					   h* 1e4/l-(T+
					   E*5*T*E)/3e2
					   )/S-X*d-B*A;
					   a=2.63 /l*d;
					   X+=( d*l-T/S
					    *(.19*E +a
					    *.64+J/1e3
					    )-M* v +A*
					    Z)*_; l +=
                                            K *_; W=d;
					    sprintf(f,
					    "%5d  %3d"
					    "%7d",p =l
					   /1.7,(C=9E3+
			      O*57.3)%0550,(int)i); d+=T*(.45-14/l*
			     X-a*130-J* .14)*_/125e2+F*_*v; P=(T*(47
			     *I-m* 52+E*94 *D-t*.38+u*.21*E) /1e2+W*
			     179*v)/2312; select(p=0,0,0,0,&G); v-=(
			      W*F-T*(.63*m-I*.086+m*E*19-D*25-.11*u
			       )/107e2)*_; D=cos(o); E=sin(o); } }

Originally found at http://www.ioccc.org/1998/banks.c

-R.W.