How does the bottom cover open in Block Out Level 642?

The blue horizontal exits through the right cyan gate while the cover shows 1, taking it to 0 and revealing the green/red lower pocket.

What is the first move after that reveal?

Move the loose pink square into the center-left space before spreading the green blocks.

Block Out level guide

expert 8 colors

Level 642 hides a green/red pocket under a bottom 1-cover; keep the one-cell waist open until the blue horizontal exits right and exposes it.

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Clear the upper yellow through the top gate, then alternate cyan exits on the right with pink/red exits on the left.
Shift the orange center bars only far enough to open the waist; do not leave either vertical across it.
Send the blue horizontal through the right cyan gate while the bottom cover reads 1; it reaches 0 and reveals green blocks, a red L, yellow vertical and cyan pieces.
Move the newly loose pink square into center-left first, then clear cyan and yellow from the revealed pocket.
Route the green mass through the left green gate and pull the red L upward after its full horizontal lane opens.
Clear the remaining top-right orange/red groups and work down beside the purple chain block.
Finish with the purple rectangle through the bottom purple gate, then send the red L through the left red gate as the final object; its exit clears the board directly into the Level 642 PERFECT card.

Colors in this level:

Pink, Red, Yellow, Cyan, Blue, Purple, Orange, Green

Dropping an orange vertical into the waist before the blue cover-clearing exit.
Pulling the revealed red L upward while the long cyan bar still occupies its turning row.

Reserve the square immediately above the cover as the hinge between upper and lower sections.
Move the loose pink square first after the reveal so the green/red pocket can spread into center.

Board notes 5 details

Layout: Two top towers and a projecting right chamber sit above a lower-left purple 1-cover. A vertical purple chain block marked 3 borders the cover; pink/red/yellow stacks fill the left and cyan/purple fill the right.
Goal: Alternate edge exits to open the central waist, send the blue horizontal through the right cyan gate to retract the cover, then release the green/red lower pocket and chained column.
Opening: Clear an upper yellow piece through the top gate, take cyan from the right, and alternate pink/red exits from the left while the orange center bars stay movable.
Danger Zone: An orange vertical or long cyan bar parked in the one-cell waist isolates the cover reveal and prevents the red L from turning upward.
Mechanics: A bottom purple 1-cover hides green blocks, a red L, yellow vertical and cyan group; a purple chain block remains beside it through the reveal.

How does the bottom cover open in Block Out Level 642?
The blue horizontal exits through the right cyan gate while the cover shows 1, taking it to 0 and revealing the green/red lower pocket.
What is the first move after that reveal?
Move the loose pink square into the center-left space before spreading the green blocks.