Picture this!

• The text "Picture this!" is transposed from the lightDOM of the main document to slot#outer.
• The slot#outer is then transposed from the shadowDOM of GreenFrame to the shadowDOM of PassePartout.
• Here, the shadowDOM of the particular GreenFrame _is_ the lightDOM for the particular PassePartout element. PassePartout elements can be reused in many different settings, and so PassePartout elements can have many different lightDOMs.