  In this paper, we present Code Shrew, a new software platform accompanied by
an interactive programming course. Its aim is to teach the fundamentals of
computer programming by enabling users to create their own drawings and
animations. The programming language has a straightforward syntax based on
Python, with additions that enable easy drawing and animating using
object-oriented code. The editor reacts seamlessly and instantly, providing an
engaging and interactive environment for experimenting and testing ideas. The
programming course consists of lessons that cover essential programming
principles, as well as challenges to test users' skills as they progress
through the course. Both the lessons and challenges take advantage of the
editor's instant feedback, allowing for a focus on learning-by-doing. We
describe the software and the content, the motivation behind them, and their
connection to constructionism.
