Different fire colors.How to make white fire.How to light self on fire without burning.(PLEASE ANSWER ANYONE)?

Those models probably used enriched gasoline. Enriched gasoline is 6 parts regular gasoline, 1 part Cs-137. Apply this thick past to your skin (it is flesh colored due to the Cesium) and ignite. The flame will remain for about 30 mins, and different colors may be obtained by using different isotopes.