Colony Flow Level 400 Answer & Walkthrough
A written step-by-step solution for Level 400, with key frames from the real playthrough and the full YouTube video.
Player not loading? Watch Level 400 on YouTube.
Picture Composition
Undertale's Sans the skeleton playing a golden trumpet, red backdrop with yellow music notes:
Red 35/40/40/40: background, largest area
Brown 25/45: outer frame and trumpet bell
Yellow 30/25/18: trumpet and notes
White/Cream 25/25/6: skull and hands
Light blue 6: outfit; Black: eye-socket outline; Orange 18: decoration
Removal Order
Red background (35, 40×3): clear in bulk first to reveal the skeleton and instrument.
Brown outer frame (25, 45): the border covers the interior — second.
Yellow trumpet + notes (30, 25, 18): once the frame is gone the instrument spans the picture.
Black eye-socket outline: covers the white skull — remove first.
Light-blue outfit (6), Orange decoration (18): small tiles, interleave.
White skull + hands (25, 25, 6): remove last.
Key Frames
| File | Time | Content |
|---|---|---|
| f_001.png | 0s | Sans on red, a 300 score block on the right |
| f_045.png | mid | Backdrop cleared, instrument being dismantled |
| f_090.png | end | Level complete |
Tips
The red background has four sizable tiles — tap them in order (top-to-bottom / left-to-right) to keep the ant queue on the same color for maximum efficiency.
Key Frames for Level 400
Every step of the solve, in order — the mosaic fills in top to bottom as each colour is carried over.
Colony Flow Level 400 FAQ
How do you beat Colony Flow Level 400?
Watch the embedded 4:30 video and follow the written walkthrough on this page: clear the outer layer first in one batch, then move to the next exposed color, working from the outside inward until the picture is empty.
What is the solution to Colony Flow Level 400?
This page gives a step-by-step written removal order with key frames from the real playthrough, plus the YouTube video. Work through each section in order — the outer ring, the middle layers, and the center.
How long is the Colony Flow Level 400 walkthrough video?
The Level 400 walkthrough runs 4:30. The written guide on this page covers the same layer order step by step if you prefer reading.
Is Colony Flow Level 400 hard?
Level 400 is a regular level — clear the outer ring, then the body, then the center.
Adjacent Levels
Stuck on another Colony Flow level?
Every one of the 545 levels has a written solution and a video walkthrough.