JavaScript
var DnDData = [[-30.4901691201296, 60], [-30.1833776214304, 59], [-29.7627840450973, 58], [-29.3947583209356, 57], [-28.9645892754055, 56], [-28.6354656536817, 55], [-28.2921821871286, 54], [-27.9905577131509, 53], [-27.7947946913668, 52], [-27.6543340290543, 51], [-27.6519828946371, 50], [-27.6173533427694, 49], [-27.5554196324518, 48], [-27.4347081962877, 47], [-27.3527616238956, 46], [-27.1500146810747, 45], [-26.9074687550566, 44], [-26.5520557024907, 43], [-26.3778269233317, 42], [-26.2025741177589, 41], [-25.9715337718657, 40], [-25.7909728444171, 39], [-25.6446160165696, 38], [-25.7040560541356, 37], [-25.8676731838619, 36], [-26.1857049460322, 35], [-26.5338463742982, 34], [-26.8991378853451, 33], [-27.0722352574209, 32], [-26.9933000067798, 31], [-26.5736545189266, 30], [-25.5369071865736, 29], [-24.0243166908922, 28], [-22.2063720253207, 27], [-20.4275559328569, 26], [-19.0900734751772, 25], [-17.9226541769101, 24], [-17.2615147887497, 23], [-16.8724851836878, 22], [-16.7577128443888, 21], [-17.1571347530026, 20], [-17.6471873975822, 19], [-18.6461197175468, 18], [-19.8885692353328, 17], [-21.2039894571651, 16], [-23.0079052401369, 15], [-25.1005655769037, 14], [-27.342591130044, 13], [-29.7388646710222, 12], [-32.1429579450835, 11], [-34.5906266190624, 10], [-37.0391503781189, 9], [-39.5315634976835, 8], [-41.9487262455882, 7], [-43.9289096382579, 6], [-46.00519229484, 5], [-48.6400387646249, 4], [-50.5736255352748, 3], [-52.8788720227602, 2], [-54.786535213712, 1]];
setInterval(ExampleUsage, 1000);
var factor = 1.2;
function ExampleUsage() {
var RawDnD = (Math.random() * 50) * 1;
// DnDData, is assumed to to have all values already
$.each(DnDData, function(i, v) {
v[1] -= 1; // decrease all keys by 1
v[0] *= factor; // factor = 1.2;
if (v[1] == -1) { // if key was 0 before, then 0-1 is -1
v[1] = 60; // replace it with 60, the new one...
v[0] = RawDnD * factor; // new data inserted,...