How to 4gate in starcraft 2

Starcraft 2 is a popular RTS (real-time strategy) video game.  It is based around 3 races; protoss, terran, and zerg.  Each race is unique and has different strengths and weaknesses and require different skill sets.  These races differ substantially while the game remains balanced.  In starcraft during the early game (the first 10 or so minutes) players use build orders, which are set orders of building and unit production that allow efficient grasps for certain goals.  Some builds are based around applying early pressure (rushing).  Some builds are based around making it to the mid-game safely (defending).  Some builds are based around making it to the mid-game with an economic advantage (being greedy).  Some builds are based around getting out a technology as soon as possible (timing attack).
4gate is a popular build that is most often used in PvP (protoss vs protoss) but is sometimes applied to PvZ (protoss vs zerg) and PvT (protoss vs terran).  It is considered a rush build, as it sacrifices early aggression in order to damage and possibly eliminate an opponent early game.

Step 1 The Build Order

*Note: All unaccounted supply is implied as probes
9 supply: Pylon
*Use initial 2 chronoboost on workers
12 supply: Gateway
14 supply: Assimilator
15 supply: Pylon
17 supply: Cybernetics Core
18 supply: Zealot
22 supply: Warpgate Research
*Use all remaining chronoboost on warpgate research
22 supply: Stalker
24 supply: 3 gateways
24 supply: stalker
26 supply: Proxy Pylon