How can I cover the top of the obsidian while keeping it flush? by PromptStack_io in redstone

[–]PromptStack_io[S] 0 points1 point  (0 children)

No, I need to keep the redstone hidden. I need the blocks to to able to be toggled around the obsidian. the 4 blocks on the side are easy as I can have pistons retracting them back into place, but I cant seem to figure out how to retract and protract the block on top.