Draw a 10 x 10 sized base face, and make it draggable with the loose facet. Add a text field that displays the offset of the box by using react, so that the text changes when the base is dragged.
A color of a face can be specified as face/color: as-color r g b, where r, g, and b are respectively the red, green, and blue content of the color (they are integers between 0 and 255). Alternatively, you can use face/color/1 for red, and /2 and /3 for green and blue.
Write a program that adjusts the color of a white base face, changing each of the r, g, b values by changing three sliders. If this works, then write a reactive version. Note how the reactive code is much simpler.
Examine the Red/System code in the ch10/hello.reds source ...
Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month, and much more.