Changing railgun railtrail color

Hello!

Someone asked me for help to change the railtrail color every time you fire. If you also want this...
Here is the script:

//-------------railtrail color changing script BEGIN-------------
bind MOUSE1 "vstr shoot"
set shoot "+attack ; -attack ; vstr rainbow"
set rainbow "color 0; set rainbow vstr rbow1"
set rbow1 "color 1; set rainbow vstr rbow2"
set rbow2 "color 2; set rainbow vstr rbow3"
set rbow3 "color 3; set rainbow vstr rbow4"
set rbow4 "color 4; set rainbow vstr rbow5"
set rbow5 "color 5; set rainbow vstr rbow6"
set rbow6 "color 6; set rainbow vstr rbow1"
echo railtrail color script loaded
//-------------railtrail color changing script END-------------

Have fun

man good old days i remember the rainbow.cfg everybody wanted it back then good times