Sure, let’s break it down frame by frame, but first, make sure your unit build and positioning were on point. Timing attacks are a dance—every second counts. Let's get your mic‑by‑mic map.

Okay, let’s dissect that. First, the 3‑worker drop is fine, but building a Supply Depot at 12 is late; it should be at 10 to avoid starvation. Second, the 00:20‑00:30 part where you fire the first Marine on the first enemy unit is a textbook “blunder” – you should lock on, aim for a key target, then switch. Third, pulling the second Marine back at 00:30 is unnecessary if you’re just building a third; it kills momentum. Also, 5‑second bursts? That’s not enough to stack damage unless you’re doing a full‑stack, which you’re not. The timing of the Medivac is also off; it should arrive before the first Siege Tower, not after. Bottom line: your micro is missing the core principle of “stack and lock” and you’re treating the attack like a one‑time splash. Let me show you the proper sequence so you don’t waste frames chasing ghosts.

Alright, here’s the micro we’re going to lock in, step by step, so you can actually hit that 10‑second window and not waste any frames. First, at 00:00 drop those three workers, but build the Supply Depot at 10, not 12. That gives you the supply cushion to start the Barracks at 00:05 without hitting the 2‑worker starve. Build the Barracks immediately after the depot finishes; that’s 00:07–00:10. While the Barracks is still building, queue your first Marine at 00:09. You want that Marine to be ready by 00:20. Next, as soon as the Barracks completes, fire the first Marine at the first visible enemy unit, but keep the fire command locked on that unit for at least 1–2 frames before switching. Do not pull the Marine back at 00:30; let the queue build the second Marine and push it into the attack as soon as it finishes, around 00:32. If a Zealot appears, drop the Medivac at 00:35, not 00:40. The Medivac should be already in the queue from 00:15, so it arrives by 00:40. By the time the Siege Tower or Widow Mine threatens, you should have three Marines in a tight line, a Medivac in front, and a worker scuttling the tower at 00:55. Hold the 10‑second burst from 00:45 to 01:00 – that means keep firing on the same target, lock on, and use the Medivac to hover above the front line so it can heal while you keep the damage stacked. If the enemy pulls back after the tower, push a third Barracks at 01:05, queue two more Marines, and have the Medivac ready to reposition at 01:10. Finish the last Marine in the queue by 01:15, and lock the enemy in the choke point. By 01:20, you should have a full 5‑Marine stack with a Medivac, ready to break or retreat in a single frame if the enemy counters. That’s the exact micro. Stick to the frame numbers, keep the formations tight, and you’ll stop chasing ghosts.