(1) Build a probe #5.
(2) Move the 4 probes to different mineral patches.
(3) Build up to probe #7.
(4) During probe #7's production, build a pylon.
(5) Build probe #8.
(6) Build a gateway.
(7) Build up to probe #12.
(8) Build a gateway.
(9) Build a Forge.
(10) Build 4 Zealots (Place At Entrance)
(11) Build many Probes. Ok this looks very slow, yet it isn't. The idea is to constantly produce probes, to create a better economy than your opponent. It's unlikely he can rush you early on, on ladder maps at least. Also if he does, you'll have at least 1 zealot out, with 2 more in the process to being warped in, making it easy to fight off 6-8 zerglings.
Now this build order allows for better production of zealots, even with only 2 gateways. It also allows for quick access to dragoons, as long as you remember to produce probes.
To extend this build order, you will want to warp in a zealot and another pylon. The Protoss is a hard race to keep under the limit since most units take up more than 1 supply. Pylons are very important early on, and making any mistake will slow you down. Getting an assimilator is a good choice after you scouted and tried to attack.
A cybernetics will soon be needed, so make sure you can build this structure fast. Upgrade the range as soon as it finishes. You would want to warp in another gateway if the map has 8 or more mineral patches. Start prodcuing dragoons as soon as gas becomes available, and scout again. Build a forge if it looks like you are going to need it, not because you want it, otherwise a group of dragoons and zealots should sit outside of the opponents base until the range upgrade is completed.
Basically you keep the pressure up if your attack is successful. Otherwise a citadel of adun to get templars to take out mass units and upgraded zealots, and a forge is needed to expand. You may want to get a robotics against another Protoss since reavers are very good against masses or zealots and dragoons, making it easier for you to come out on top with more units.
