Both are relatively easy and can be done in a few minutes in Creative or Survival.
Proceed to the climax of the piston scene. This triggers the permanent unlock of the Jack-o'-Lantern Girl character. The "No-Clip" & Ender-Achievement lovely craft piston trap achievement guide
: Unlocking this character requires a multi-step ritual. Players must buy six wood and one hide from the shop, craft a door, and sell it back to acquire the skeleton character . Once the ritual background is unlocked, crafting a carved pumpkin using a pumpkin and scissors activates the final trigger for the Jack-o-Lantern character . Both are relatively easy and can be done
Most achievements are tied to specific interactions during piston scenes or reaching resource milestones. Achievement How to Unlock craft a door