Scheme Request for Implementation 203,
"A Simple Picture Language in the Style of SICP,"
by Vladimir Nikishkin,
is now available for discussion.
Its draft and an archive of the ongoing discussion are available at https://srfi.schemers.org/srfi-203/.
You can join the discussion of the draft by filling out the subscription form on that page.
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Here's the abstract:
This SRFI proposes a simple library for programmatic drawing of pictures compatible with the Section 2.2.4 of the Structure and Interpretation of Computer Programs.
It aims to close the gap between the Scheme suggested for study in the book and the portable Scheme.