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In your autoexec.cfg :

alias w "wait"
alias w4 "wait; wait; wait; wait"
alias w5 "w4; w"
alias w10 "w5; w5"
alias w11 "w10; w"
alias burst "+attack; w4; -attack"
alias strafe "burst; w11; burst; w11; burst"
alias raf "raf_on"
alias raf_on "alias raf raf_off; bind mouse1 strafe"
alias raf_off "alias raf raf_on; bind mouse1 +attack"
bind "mouse4" "raf"

//press mouse1 for strafe
//this script  made a 3 shoot fire when you press activating key
// ( mouse4 )
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