How do I start Colony Flow Level 4 without clogging the trail?

The green grass region of the mushroom is the smallest area in the pixel art, and four green cubes are enough to close it on their own. Sending green first seals that region before the cap and sky traffic starts, so the rest of the board can be planned in a clean order.

Why does the route jam if I switch colors too early in Colony Flow Level 4?

Save the column 2 cyan 32 for the cyan sky backfill, after the stem, cap outline, brown door, and white spots are already open. The sky is the largest single region in the art, so this stack has to last the longest route, and sending it too early jams the perimeter trail.

Colony Flow! level guide

Colony Flow! Level 4 Walkthrough

easy 6 colors

Colony Flow Level 4 is a mushroom house pixel-art board where the green 4 stack in the top-left must be sent first, the yellow 8 stem stack must be cleared before the cap traffic builds, and the three white buffer slots in the 5-cell top row have to stay open as staging space for the bigger red, cyan, and black stacks arriving from the 3 columns below.

Board Notes

Layout: The play area sits below a mushroom house pixel-art target (red cap, three white spots, yellow stem with brown door, green grass strip, dark outline, cyan sky). Two brown round ant nests are placed side by side directly under the art. Below the nests, the board has a 5-cell top row plus 3 columns of stacks running 4 rows deep. The top row opens with green 4, red 15, and three white empty buffer slots. Column 1 is red 15 / cyan 30 / black 25, column 2 is yellow 8 / cyan 32 / black 32, and column 3 is red 15 / cyan 32 / black 25, with a fourth row of further stacks behind them.
Goal: The level is solved when the mushroom house pixel art at the top of the screen is fully revealed. Green cubes fill the grass, red cubes fill the cap, yellow cubes fill the stem, white cubes fill the three spots on the cap, black cubes fill the dark outline and the brown door under the stem, and cyan cubes fill the large cyan sky background. Every stack on the play area must be drained into the matching region of the art before the level is considered clear.
Opening: The first tap is the green 4 stack in the top-left cell of the play area. It is the safest opener because the grass strip is tiny and four green cubes close it on their own, so the rest of the board can stay untouched. Once the green ants cycle back to the two nests, the second tap is the yellow 8 stack in column 2, because the yellow stem is also small and can be finished before the cap and sky traffic starts to build.
Danger Zone: The danger zone is tapping any of the larger red 15, cyan 30, cyan 32, or black 25/32 stacks before its matching art region is free, because the three columns share the same perimeter trail around the mushroom and two large stacks sent back to back will pile ants on the same route. The three white empty buffer slots in the top row are the other trap: they must stay open as staging space for new stacks arriving from the lower columns, and filling them with an early red or black click blocks the next required color.
Mechanics: Level 4 is a multi-stack color routing board with a single-color opener (green 4) and a pixel-art completion goal. The two ant nests split traffic between the left and right sides of the mushroom, so red can route on the left and black or cyan can route on the right at the same time. The 5-cell top row with three white buffer slots is the active queue, and the 3 columns behind it act as the supply that refills the queue as stacks are sent.

Quick Tips for Colony Flow! Level 4 (spoiler-free)

Send the green 4 first so the small grass region is closed before the cap traffic starts, then send the yellow 8 from column 2 to seal the stem while the rest of the board is still quiet.
Alternate cyan and red taps so the ants use both sides of the perimeter trail. Two cyan stacks in a row will stall the second batch on the same lane.
Keep the three white buffer slots in the top row open. They are the staging space for the new stacks that arrive from the 3 columns below, not a place to dump an early red or black click.

How to Solve Colony Flow! Level 4 — Full Solution

Tap the green 4 stack in the top-left cell of the play area and let the worker ants carry all four green cubes into the grass strip at the base of the mushroom. Wait for the ants to return to the two brown nests before tapping again.
Tap the yellow 8 stack in column 2 to start filling the yellow stem. The stem is a small region, so eight yellow cubes are enough to close it in one batch.
Tap the red 15 stack in the top row to begin filling the red cap. Watch the trail so the three white-spot cells in the cap stay open for the white stacks that arrive later from the lower columns.
Alternate the cyan 30 (column 1) and the cyan 32 in column 3 so the ants use both sides of the perimeter trail around the art. Do not send two cyan stacks in a row or the second batch will stall on the same lane.
Tap the three black 25/32/25 stacks one at a time, waiting for each batch of ants to clear the trail before the next. The black cubes fill the dark outline of the mushroom and the brown door under the stem, and those cells accept cubes slowly.
Use the white cube stacks (white 18 and similar) to fill the three white spots on the red cap. These are small batches and should each be sent in a single tap rather than chained with red or black.
Finish by tapping the remaining cyan 32 in column 2 to backfill the cyan sky. The sky is the largest single region of the art, so this stack has to last the longest route.
Clear the final red 2 and any leftover white stack with single taps. The pixel art is now complete and the level clears as soon as the last cube is delivered into its matching cell.

Colors in this level:

Green, Red, Yellow, Cyan, Black, White

Common Mistakes to Avoid

Tapping the largest cyan 32 in column 2 before the stem and cap regions are open, which dumps ants onto the perimeter trail and blocks the smaller red and white stacks behind it.
Filling the three white buffer slots in the top row with an early red or black click, which leaves no staging space for the new stacks arriving from the lower columns.
Sending two cyan stacks in a row on the same side of the trail, which stalls the second batch behind the first ants still walking back to the nests.

Frequently Asked Questions

How do I start Colony Flow Level 4 without clogging the trail?
The green grass region of the mushroom is the smallest area in the pixel art, and four green cubes are enough to close it on their own. Sending green first seals that region before the cap and sky traffic starts, so the rest of the board can be planned in a clean order.
Why does the route jam if I switch colors too early in Colony Flow Level 4?
Save the column 2 cyan 32 for the cyan sky backfill, after the stem, cap outline, brown door, and white spots are already open. The sky is the largest single region in the art, so this stack has to last the longest route, and sending it too early jams the perimeter trail.