This is a pretty greedy build you can do as Protoss. Open Nexus first, but before your Cybernetics Core, get a second Gateway. When it finishes, you can crank out double Adept and use that to scout, harass, or, in a pinch, defend while you get your 3rd Nexus started around 3:00.
For another example, check out this game between Welmu and True.
12 | 0:01 | Probe | |
13 | 0:10 | Probe | |
14 | 0:21 | Pylon, Probe | |
15 | 0:38 | Probe | |
16 | 0:48 | Probe | |
17 | 0:59 | Nexus | |
17 | 1:00 | Probe | |
18 | 1:10 | Probe | |
19 | 1:15 | Gateway | |
19 | 1:20 | Assimilator | |
19 | 1:21 | Probe | |
20 | 1:32 | Probe | |
21 | 1:36 | Gateway | |
21 | 1:42 | Probe | |
21 | 1:46 | Pylon | |
22 | 1:53 | Probe | |
23 | 2:04 | Probe | |
23 | 2:09 | Cybernetics Core | |
24 | 2:11 | Probe | |
24 | 2:15 | Probe | |
26 | 2:22 | Probe | |
27 | 2:25 | Probe | |
28 | 2:32 | Probe | |
28 | 2:36 | Probe | |
30 | 2:44 | Probe | |
30 | 2:46 | Warp Gate | |
35 | 2:49 | Probe | |
35 | 2:50 | Adept x2 (Chrono Boost) | Send them out to scout ASAP |
36 | 2:57 | Probe | |
38 | 3:02 | Probe (Chrono Boost) | |
38 | 3:03 | Nexus | |
38 | 3:14 | Pylon | |
38 | 3:15 | Probe (Chrono Boost) | |
41 | 3:17 | Mothership Core (Chrono Boost) |
The obvious follow-up here is to continue to invest in Adepts and get upgrades and more Gateways. However, you should be able to diversify into your favorite composition with this economy in place.