rect 01.html       0,   0,  99,  99
rect 02.html     100,   0, 199,  99
rect 03.html     200,   0, 299,  99
rect 04.html     300,   0, 399,  99
rect 05.html     400,   0, 499,  99
rect 06.html       0, 100,  99, 199
rect 07.html     100, 100, 199, 199
rect 08.html     200, 100, 299, 199
rect 09.html     300, 100, 399, 199
rect 10.html     400, 100, 499, 199
rect 11.html       0, 200,  99, 299
rect 12.html     100, 200, 199, 299
rect 13.html     200, 200, 299, 299
rect 14.html     300, 200, 399, 299
rect 15.html     400, 200, 499, 299
rect 16.html       0, 300,  99, 399
rect 17.html     100, 300, 199, 399
rect 18.html     200, 300, 299, 399
rect 19.html     300, 300, 399, 399