William has 1 luck token and, in his storage, 3 water tiles and 1 medium koi.
Among the Helper cards at his disposal, he decides to use the Porter card A to place 2 water tiles.
Then, he decides to use his Sensei action B to place the medium koi, using 1 of the 2 water tiles just placed (see below)
Next, he spends his luck token C to take 1 foliage tile D, which he immediately places using the Gardener card E.
Finally, he uses the Builder card F to upgrade his shore with a lantern (taken from the supply), thus obtaining a new luck token.
Satisfied with the turn, he passes without using the second Porter card G, keeping 1 water tile in storage and without spending the newly gained luck token.