PROJECT REFERENCE
BASIC 7.0 GRAPHICS VOCABULARY USED IN THIS PROJECT

GRAPHIC
Selects text/graphics modes, including VIC-II bitmap modes and 80-column VDC text.

COLOR
Assigns colors to logical screen color sources.

DRAW
Draws points and line segments.

BOX
Draws rectangles, with outline/fill options.

CIRCLE
Draws circles and ellipse-like shapes.

CHAR
Places text on graphics screens.

GET
Polls keyboard input without blocking the display loop.

DO / LOOP
Lets the program express animation loops far more cleanly than endless GOTO chains.

SIN / COS
Provide the mathematical backbone for orbit plots, radar sweeps, waveforms, polar
plots, and wireframe rotation.

The archive's visual rule: use these commands as primitives, not as the finished
design. A circle by itself is a BASIC demo. A circle embedded in range rings,
reticles, labels, target history, and motion becomes an instrument.