Highlighter

Highlighter is a programming language that is inspired by highlighters. It was created by User:Hammy.

Commands

The actual commands don't matter, only the highlighting.

Highlight color	Type	Combination	Operation
Red	Primary	Red	Push 0 to the stack.
Yellow	Primary	Yellow	Push 1 to the stack.
Blue	Primary	Blue	Mathematical operations (depends on what it's mixed with). On it's own, pop a value from the stack and jump to the command with the index of that value.
White/None1	Primary (at least, User:Hammy thinks so...)	White	NOP. Just a modifier for other colors.
Black	Primary	Black	Halt. In real life, it would be represented by scribbling over a letter.
Pink	Secondary	Red + White	Output the top value of the stack as an ASCII character.
Green	Secondary	Blue + Yellow	Subtraction.
Orange	Secondary	Red + Yellow	If the top value of the stack is 0, push 1. Otherwise, push 0.
Purple	Secondary	Red + Blue	Add.
Olive	Tertiary	Blue + Yellow + Black	I don't know yet.
Brown	Tertiary	Red + Blue + Yellow	I don't know yet.