Simultaneous Pulses

I need to run, in 03 output pins, pulses as shown in picture below.

Watch that is a time when the cycles are simultaneous.

Any idea to programming this?

If you have a suggestion, I suggest you to answer on this post, to keep only one post/topic:
http://www.arduino.cc/cgi-bin/yabb2/YaBB.pl?num=1225739204