http://lushprojects.com/circuitjs/circuitjs.html
$ 1 0.000005 0.22070718156067046 50 5 50 5e-11
f 480 192 480 48 41 1.5 60
401 560 192 480 192 1 8\s15\s-15\s1000000\s1.7164766472621689\s1.752033140327569\s100000 0\s20\s10000000000 1\s0
r 416 192 416 48 0 10000
w 416 192 480 192 0
w 416 48 464 48 0
162 624 208 624 304 2 default-led 1 0 0 0.01
r 624 48 624 128 0 390
g 528 304 528 320 0 0
r 704 48 704 176 0 26000
r 704 176 704 304 0 24000
s 416 304 528 304 0 1 true
r 416 192 416 304 0 220
w 560 208 608 208 2
w 560 176 608 176 2
w 624 208 624 176 0
w 496 48 624 48 0
w 624 304 704 304 0
w 528 304 624 304 0
w 624 48 704 48 0
r 800 48 800 304 0 15
w 704 48 800 48 0
w 704 304 800 304 0
172 288 48 240 -16 0 7 3.6519999999999997 3.8 3.4 0 0.5 one cell
w 288 48 416 48 1
w 704 176 608 176 0
w 608 208 624 208 0
w 624 128 624 176 1
w 624 464 624 512 1
w 608 544 624 544 0
w 704 512 608 512 0
w 288 384 416 384 1
172 288 384 240 320 0 7 7.272 7.4 7 0 0.5 two cells
w 704 640 800 640 0
w 704 384 800 384 0
r 800 512 800 640 0 15
w 624 384 704 384 0
w 528 640 624 640 0
w 624 640 704 640 0
w 496 384 624 384 0
w 624 544 624 512 0
w 560 512 608 512 2
w 560 544 608 544 2
r 416 528 416 640 0 220
s 416 640 528 640 0 1 true
r 704 512 704 640 0 12000
r 704 384 704 512 0 38000
g 528 640 528 656 0 0
r 624 384 624 464 0 1000
162 624 544 624 640 2 default-led 1 0 0 0.01
w 416 384 464 384 0
w 416 528 480 528 0
r 416 528 416 384 0 10000
401 560 528 480 528 1 8\s15\s-15\s1000000\s1.727280418092011\s1.7451076463023836\s100000 0\s20\s10000000000 1\s0
f 480 528 480 384 41 1.5 60
r 800 384 800 512 0 15
x 837 185 867 188 4 24 2w
x 833 455 863 458 4 24 2w
x 833 583 863 586 4 24 2w