Random Fireworks

function randomColor() :: number:
	set {_colorpattern} to random integer between 1 and 6
	if {_colorpattern} is 1:
		set {_r} to 255
		set {_g} to random integer between 0 and 255
		set {_b} to 0
	if {_colorpattern} is 2:
		set {_r} to 0
		set {_g} to 255
		set {_b} to random integer between 0 and 255
	if {_colorpattern} is 3:
		set {_r} to random integer between 0 and 255
		set {_g} to 0
		set {_b} to 255
	if {_colorpattern} is 4:
		set {_r} to random integer between 0 and 255
		set {_g} to 255
		set {_b} to 0
	if {_colorpattern} is 5:
		set {_r} to 0
		set {_g} to random integer between 0 and 255
		set {_b} to 255
	if {_colorpattern} is 6:
		set {_r} to 255
		set {_g} to 0
		set {_b} to random integer between 0 and 255
	return {_r}*65536+{_g}*256+{_b}
every tick:
	loop all entities:
		loop-entity is a firework rocket
		tag "Life" of nbt of loop-entity is 1
		add "{LifeTime:29,FireworksItem:{tag:{Fireworks:{Explosions:[{Type:%random integer between 0 and 4%,Flicker:%check [chance of 0.5]%,Trail:%check [chance of 0.5]%,Colors:[I;%randomColor()%]}]}}}}" to nbt of loop-entity