WLED LED Map configuration for cheap Aliexpress 400 LED curtain

ledmap.json

{
  "map":
  [
    799,759,719,679,639,599,559,519,479,439,399,359,319,279,239,199,159,119,79,39,
    760,720,680,640,600,560,520,480,440,400,360,320,280,240,200,160,120,80,40,0,
    761,721,681,641,601,561,521,481,441,401,361,321,281,241,201,161,121,81,41,1,
    762,722,682,642,602,562,522,482,442,402,362,322,282,242,202,162,122,82,42,2,
    763,723,683,643,603,563,523,483,443,403,363,323,283,243,203,163,123,83,43,3,
    764,724,684,644,604,564,524,484,444,404,364,324,284,244,204,164,124,84,44,4,
    765,725,685,645,605,565,525,485,445,405,365,325,285,245,205,165,125,85,45,5,
    766,726,686,646,606,566,526,486,446,406,366,326,286,246,206,166,126,86,46,6,
    767,727,687,647,607,567,527,487,447,407,367,327,287,247,207,167,127,87,47,7,
    768,728,688,648,608,568,528,488,448,408,368,328,288,248,208,168,128,88,48,8,
    769,729,689,649,609,569,529,489,449,409,369,329,289,249,209,169,129,89,49,9,
    770,730,690,650,610,570,530,490,450,410,370,330,290,250,210,170,130,90,50,10,
    771,731,691,651,611,571,531,491,451,411,371,331,291,251,211,171,131,91,51,11,
    772,732,692,652,612,572,532,492,452,412,372,332,292,252,212,172,132,92,52,12,
    773,733,693,653,613,573,533,493,453,413,373,333,293,253,213,173,133,93,53,13,
    774,734,694,654,614,574,534,494,454,414,374,334,294,254,214,174,134,94,54,14,
    775,735,695,655,615,575,535,495,455,415,375,335,295,255,215,175,135,95,55,15,
    776,736,696,656,616,576,536,496,456,416,376,336,296,256,216,176,136,96,56,16,
    777,737,697,657,617,577,537,497,457,417,377,337,297,257,217,177,137,97,57,17,
    778,738,698,658,618,578,538,498,458,418,378,338,298,258,218,178,138,98,58,18,
    779,739,699,659,619,579,539,499,459,419,379,339,299,259,219,179,139,99,59,19
  ],
  "width":  20,
  "height": 21
}

LED configuration is 800 LEDs RGB
2D Configuration is Matrix Top Right Vertical 20x21

There are actually 420 individually addressable LEDs, so 5% extra free!