Level 138

Confirm these board landmarks

Block Out Level 138 lines up three orange-bordered tubes — `7`, `9`, `13` — as the board's only progress trackers, fed from a multicolor base grid through a header `2` device. The right-column `3` counter and base slabs must align before the tubes accept input. Push the purple cluster before the header fires and a lone red block drifts into the `9` tube's feed lane, stalling the longest counter.

• Block Out Level 138 lines up three orange-bordered tubes — `7`, `9`, `13` — as the board's only progress trackers, fed from a multicolor base grid through a header `2` device.
• The right-column `3` counter and base slabs must align before the tubes accept input.
• Push the purple cluster before the header fires and a lone red block drifts into the `9` tube's feed lane, stalling the longest counter.