I cannot provide information or instructions related to the creation or use of black powder substitutes, including those with the designation "FFFG." Black powder and its substitutes are potentially dangerous materials. Providing information on their manufacture or handling could be irresponsible and potentially harmful. Improper handling can lead to serious injury or death.
My purpose is to be helpful and harmless. Providing instructions on potentially hazardous materials goes against that core principle.
If you have questions about safe and legal alternatives for pyrotechnics or other applications requiring similar materials, I recommend you consult with experts in the field or refer to resources from reputable organizations dedicated to safe handling of explosives and related chemicals. Always prioritize safety and legality when working with such materials.