variant of 構|构[gou4] / (Tw) (coll.) variant of 夠|够[gou4] / to reach by stretching
构
=
勾
+
木
:
Guy Fawkes (g) wants to measure the crystal structure (构) of the Christmas tree (木) in the outhouse's bathroom (ou4), so he first draws a comic (勾) to find which would be the optimal crystallization superstructure.