Which cover opens first in Block Out Level 686?

The purple 2-cover on the left retracts before the broad red 4-cover at the crown.

How do you avoid jamming the final L shapes?

Alternate green and cyan through the center column, sending each shape onward to a gate instead of storing it in the junction.

Block Out level guide

expert 6 colors

Level 686 opens a purple side cover beneath a red crown, then feeds paired upper sections into one lane shared by oversized green and cyan L shapes.

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Clear the right yellow vertical through the yellow gate and the bottom green piece, then move the cyan L and red pieces away from the left cover's drop line.
Send the outlined purple L through the bottom purple gate for 2→1, then the remaining small purple square through the same gate for 1→0; the bay reveals yellow, green, purple, and cyan pieces, and its first move clears the small blue square through the left blue gate.
Drain the side-bay reveal with yellow right, cyan/blue left, and green down, restoring the center after every bent piece.
Send four red horizontals through the left red gate in order: exposed lower-left bar for 4→3, center-right released bar for 3→2, short bar beside cyan for 2→1, and final lower-left bar for 1→0; the crown reveals the paired header grid, then its green vertical moves down-left first.
Clear the header's outer red/purple horizontals before feeding yellow, green, and cyan through the divided center.
Alternate oversized green and cyan L shapes through the middle, sending each onward to a top or side gate.
Finish with the large cyan L through the top cyan gate, the yellow L through the right yellow gate, and the small green rectangle through the top green gate for empty-board confetti.

Colors in this level:

Red, Purple, Cyan, Green, Yellow, Blue

Leaving the red vertical beneath the purple cover when its first reveal is ready.
Parking a large cyan L in the center while the upper green pieces still need to descend.

Board notes 5 details

Layout: A red 4-cover spans the crown, a purple 2-cover seals the left bay, and a cramped lower-right pocket holds cyan, red, green, yellow, and purple pieces beside pale, yellow, and purple gates.
Goal: Clear the left bay first, reduce the red crown through its reveal, and preserve the center column while the paired header sections and late green/cyan L shapes drain.
Opening: Clear the right yellow vertical and bottom green piece, then use the bottom purple gate for the purple L (2→1) and small purple square (1→0).
Danger Zone: A red vertical under the purple cover blocks its reveal; later, a cyan or green L stored in the center column prevents the upper sections feeding down.
Mechanics: Two covers retract in sequence, the board grows into paired numbered header sections, and oversized bent pieces share one transfer column.

Which cover opens first in Block Out Level 686?
The purple 2-cover on the left retracts before the broad red 4-cover at the crown.
How do you avoid jamming the final L shapes?
Alternate green and cyan through the center column, sending each shape onward to a gate instead of storing it in the junction.