normal light	diffuse light
very slow	jpg images tracking data challenge tags	jpg images tracking data challenge tags
slow	jpg images tracking data challenge tags	jpg images tracking data challenge tags
medium	jpg images tracking data challenge tags	jpg images tracking data challenge tags
fast	jpg images tracking data challenge tags	jpg images tracking data challenge tags
very fast	jpg images tracking data challenge tags	jpg images tracking data challenge tags
increasing	jpg images tracking data challenge tags	jpg images tracking data challenge tags