Using the TIC-80 fantasy console simulator on your pi, implement a program that visually displays a range of values (lower and upper bounds adjustable by the user) that colorfully displays whether each value is a prime or composite value.

The algorithm you are to implement is the trial-by-division brute force (naive: NO optimizations)

Time how long it takes to execute (displaying elapsed time for the run at its conclusion; this is useful for comparisons).

Additionally, the entire class will be participating in documenting and filling out this project page. It is the responsibility of EACH class member to:

• ask copious, clarifying questions (so you can better add content)
• craft a coherent and organized document, with information located under pertinent headings
• explain the fundamentals of the process, conceptual background, algorithmic approach, and you can even suggest particulars related to TIC-80 (certain functions that might prove useful- individual, unrelated snippets to do things like capturing time, or displaying text, etc.)
• to get full credit, each individual that submits must perform no fewer than 4 changes to this document (as viewable from the wiki revision system). Failure to do so will result in documentation penalties being applied.

TIC80 works on a system of carts. The carts present on a system can be listed via a familiar call to `ls`, or, at a more involved level, the system folder which TIC80 uses to store its data can be accessed via the `folder` command in the TIC80 terminal. A new cart can be made with the `new` command, and the loaded cart can be saved via the `save` command. The code content of these cards after `load`ing them can be accessed by pressing [ESC] from the terminal, opening the included basic IDE equipped with a code, sprite, map, sfx, and music editor.

The code editor is relatively simple: 64KB are allotted for a script written in any of: Lua, JavaScript, Moonscript, Wren, Fennel, and Squirrel. External packages may also be used to allow for the usage of more languages. The first step in writing a basic program in TIC80 is to supply a series of comments (formatted in the choice language) which allow TIC80 to ascertain four pieces of metadata, as in:

-- title: PrintThing(TM)
-- author: Wedgie
-- desc: Print.. something.
-- script: lua

for Lua, or:

// title: PrintThing(TM)
..
// script: js

for JavaScript, and so on.

Once a language is selected, a developer will need to include a `TIC()` function. This is essentially the “main” function as many other programs would have, and is called automatically once the `run` command is issued on the cart 60 times per second. This can be relied on to provide synchronous 60fps display and physics or other necessary mechanics. Additionally, the `spr()`, `print()`, and `cls()` functions will prove essential. The `spr()` (Sprite) function is used to call upon sprites designed in the sprite editor and place them at some location on-screen. `print()` (Print) is more clear: this will print text directly to screen in the default font. It should be noted that the print function can also accept additional arguments for text position, size, and color. `cls` (Clear Screen) simply clears the screen of all pixel data and resets to blank.

As it is an intentionally minimally optimized (in a way, optimally suboptimal) method, going about this task will be relatively simple, relying on three major areas: user interaction/input, prime checking, and visual output. Chronologically, upon run, the program will execute essentially the following steps:

1. Request input
   1. Store
2. Pass input to prime checker
   1. Return True/False for Prime/Composite
3. Use return value of prime checker to determine output
   1. If prime, positive output (e.g. rainbow/green/bright)
   2. If composite, negative/neutral output (e.g. monochrome/red/dull)

The `print` function can be used to print text on the screen, but it also returns the width of the text. For example, `local string=print(“Hello, World!”,0,0,12)` would not only print the text on the screen, but it would also give the local variable `string` a value equal to the width of “Hello, World!” in pixels. This is especially helpful if you want to display a sprite after a string, but you don't feel like counting out how much space you need manually.

The `time` function returns the current run-time of the program in milliseconds. This is useful in a variety of circumstances; having something happen at a specific timestamp, having things refresh at a certain interval, etc. For pnf0, specifically, expertly utilizing `print()` alongside `time()` would display the current run-time in seconds, which is a requirement.

https://github.com/nesbox/TIC-80/wiki