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// --- base = 4 height -- base = 4 altezza ---

function f(x) { y = 1/0; return y }
...
aX = 0; bX = 12*9; aY = 0; bY = 450
Dx = 12; Dy = 50
...
C0="red"; C1="blue"

Ly=[41, 44, 72, 79, 197, 62, 0, 200, 52, 95, 155, 108, 71, 34, 257, 37, 161, 68, 0, 20, 14, 7, 63, 112, 172, 67, 48, 197, 16, 30, 63, 24, 115, 42, 88, 34, 70, 159, 30, 115, 65, 30, 95, 61, 88, 276, 112, 42, 187, 35, 111, 64, 101, 61, 11, 26, 25, 149, 0, 70, 10, 97, 27, 286, 12, 5, 14, 232, 57, 38, 6, 22, 34, 19, 7, 142, 2, 25, 6, 68, 61, 349, 84, 157, 44, 71, 61, 27, 93, 44, 67, 0, 423, 145, 57, 0, 47, 44, 65, 78, 16, 110, 28, 49, 391, 245, 54, 72]

for(i=0; i < Ly.length; i=i+1) {Lx[i]=i}

L1y=[41, 57.185, 76.148, 93.556, 99.444, 95.444, 92.333, 93.889, 102.5556, 107.4815, 107.6296, 104, 100.6296, 109.5185, 114.7037, 116.4444, 95.63, 69.778, 40.63, 24.926, 23.296, 39.963, 66.667, 91.778, 104.2593, 103.5185, 97.259, 84.778, 70.296, 55.926, 51.741, 57.63, 63.63, 67.37, 67.037, 71.63, 79.963, 85.667, 86.037, 78.037, 71.111, 67.259, 76.333, 97.037, 123.3704, 137.8889, 133.8148, 119.2593, 102.963, 94.963, 86.593, 81.704, 69.778, 55.741, 44.074, 41.815, 51.444, 55.63, 57.111, 49.63, 58.815, 73.37, 97.333, 95.037, 84.519, 67.741, 75.963, 81.37, 78, 53.852, 34.296, 23.296, 26.037, 32.556, 43.333, 45.185, 42.296, 34.111, 47.407, 77.259, 125.2222, 149.5556, 151.037, 120.3333, 92.111, 68.741, 60.259, 58.111, 56.741, 67.889, 90.852, 135.4444, 157.2963, 148.4815, 100.8519, 62.185, 43.778, 47.667, 55.037, 58.111, 59.704, 69.296, 99.778, 147.8519, 182.5556, 180.2222, 135.963, 72]
for(i=1; i< L1y.length-1; i=i+1) {L1x[i]=i}
...
AAX=""; BBX=""; AAY=""; BBY=""

AX=BX=AY=BY=""
AAY=aY; BBY=bY
BY="n = "+Ly.length
AY="Dn = "+Dx
...