Marker-file for torque CartoDB

I am trying to plot some color code (only 3 colors by the moment) cars in my map instead the regular color code points. I am using torque cat to do it, but all the time the car is in black!, I need some help. This is my code:

/** torque_cat visualization */

Map { -torque-frame-count:64; -torque-animation-duration:1; -torque-time-attribute:"date"; -torque-aggregation-function:"CDB_Math_Mode(torque_category)"; -torque-resolution:2; -torque-data-aggregation:linear; }

untitled_table_1{

comp-op: lighter; marker-fill-opacity: 0.9; marker-line-color: #FFF; marker-line-width: 0; marker-line-opacity: 1; marker-type: ellipse; marker-width: 6; marker-fill: #FF9900; marker-file: url(http://ift.tt/1DyQGUg);

}

untitled_table_1[value=1] {

marker-fill: #B81609; }

untitled_table_1[value=2] {

marker-fill: #012700; }

untitled_table_1[value=3] {

marker-fill: #7B00B4; }

Thank you!