Torque Bubble + Color CartoCSS Style

style.css

/** Torque Map Viz */

Map {
-torque-frame-count:150;
-torque-animation-duration:30;
-torque-time-attribute:"date";
-torque-aggregation-function:"sum(norm)";
-torque-resolution:4;
-torque-data-aggregation:linear;
}

#layer { 
  comp-op: multiply;
  marker-fill-opacity: 0.7;
  marker-line-width: 0.4;
  marker-line-opacity: 1;
  marker-width: 8; 
  marker-allow-overlap: true;
  marker-fill: rgb(223,253,251);
  marker-line-color: #BCEEEA ;
}

#layer {
  
[value >= 0] {
    marker-fill: #5c53a5;
    marker-width: 2
}

[value >= 25] {
    marker-fill: #a059a0;
    marker-width: 4
}
  
[value >= 50] {
    marker-fill: #ce6693;
    marker-width: 8
}
  
[value >= 75] {
    marker-fill: #eb7f86;
    marker-width: 16
}
​
[value >= 100] {
    marker-fill: #f8a07e;
    marker-width: 32
}
  
}