cool:
rot2;n:rot21;iv:mul1;itheta:angle;cdir:0;;mul;n:mul1;ia:.pos;ib:r;;prev;n:prev1;ipos:rot21;cwrap:0;csample:0;;square;n:square1;ipos:.pos;iinside:hue2;ioutside:mul3;isize:0.995;;wtadd;n:wtadd2;iaw:1;ibw:1;ia:.pos.x;ib:.pos.y;;hue;n:hue1;icolor:#00f;ishift:hshift;;wtadd;n:wtadd3;iaw:1;ibw:1;ia:wtadd2;ib:.time;;sin;n:sin1;it:wtadd3;iperiod:1;iamp:1;iphase:0;icenter:0;ctype:0;cnonneg:1;;pow;n:pow1;ia:sin1;ib:1;;mul;n:hshift;ia:pow1;ib:0.3333;;sin;n:angle;it:.time;iperiod:2;iamp:0.01;iphase:0;icenter:0.01;ctype:0;cnonneg:1;;sin;n:r;it:.time;iperiod:1.618;iamp:0.01;iphase:0;icenter:1;ctype:0;cnonneg:1;;mul;n:mul3;ia:2;ib:hue1;;clamp;n:clamp1;ival:mul3;imin:0;imax:1;;mul;n:mul2;ia:clamp1.x;ib:clamp1.z;;wtadd;n:wtadd4;iaw:1;ibw:-0.2;ia:1;ib:mul2;;mul;n:mul4;ia:clamp1;ib:wtadd4;;hue;n:hue2;icolor:prev1;ishift:0.01;;_out=square1
circle;n:circle1;ipos:.pos;iinside:hue1;ioutside:#a00;isize:0.99;;prev;n:prev1;ipos:rot21;cwrap:1;csample:0;;mul;n:mul1;ia:.pos;ib:sin1;;hue;n:hue1;icolor:prev1;ishift:0.2;;rot2;n:rot21;iv:mul1;itheta:mul2;cdir:0;;mul;n:mul2;ia:.time;ib:0.1;;sin;n:sin1;it:.time;iperiod:4;iamp:0.05;iphase:0;icenter:1.5;cnonneg:0;;_out=circle1

worley noise:
worley;n:worley1;ix:.pos,.time;ifreq:8,8,1;;pow;n:pow1;ia:worley1;ib:1,8,8;;worley;n:worley2;ix:.pos,.time;ifreq:12,12,1;;pow;n:pow2;ia:worley2;ib:2,8,2;;clamp;n:clamp1;ival:pow1;imin:pow2;imax:1;;_out=clamp1

simple fun with floor:
floor;n:floor1;ix:.pos01.x;istepw:0.1;isteph:0.1,0.1,0.2;iphase:0;;_out=floor1

noisy:
buffer;n:output;iinput:sn1,sn2,sn3;;rot2;n:rot21;iv:.pos;itheta:mul1.w;cdir:0;;circle;n:circle1;ipos:.pos;iinside:rot21,0;ioutside:#000;isize:0.8;;noise_sin;n:sn1;ix:rot21.xy,mul1.x;;remap;n:remap1;ix:.pos;ia1:-1;ib1:1;ia2:0;ib2:6.28;;noise_sin;n:sn2;ix:rot21.xy,mul1.y;;noise_sin;n:sn3;ix:rot21.xy,mul1.z;;mul;n:mul1;ia:.time;ib:0.2,0.4,0.6,0.1;;prev;n:prev1;ipos:.pos;cwrap:0;csample:0;;_out=output

simple cross product:
s.pommicket.com/pugl/index.html?import=_title%3Dcross%3B%3Bcross%3Bn%3Across1%3Bix%3A.pos.xy%2C1%3Biy%3A0.2%2C.pos.xy%3B%3B_out%3Dcross1