選択点灯

The figure is a snapshot of Selection-Lit in Japanese environment.

[NOTE]
The correct terminating condition in the algorithm for the factorial calculation should be (= n 0).
To say the truth, Viivi currently has a Problem.
I wrote a sample code in order to explain and ask the problem, including a modified condition (= n 1), and made a mistake to use the code directly for creating the figure.
The condition in the figure will be corrected in the next update.
I apologize for any inconvenience this may cause to you.

In the halted-state, when the user selects a Scheme object of interest, the selected target, the related S-expression in the source code, and the related Scheme objects are highlighted on the respective windows.

Violet-colored cursors are used for the Selection-Lit by default.

The user can cancel the Selection-Lit by hitting the ESC-key on the keyboard or by clicking the pointer in an unrelated area on the windows.