need help with commabd button

[yasserhome]

Dear :-
please i need some help from you in vba excel
in active sheet ( not user form )
i have to 2 command button ( activex control )
i need to make command button2 flash continuously when i click on the other command button 1
but not using for i to x number
and when i click the command button2 ( flashing button ) the flash stop
till i click on command button 1 and then i flash again
So this is what i need
hope to help me soon as posible
thanks