create README

README.md

@@ -0,0 +1,23 @@
+# bf-debugger
+An interactive brainfuck executor and debugger. It allows setting memory and code breakpoints, step a number of times, view the memory state and output.
+
+![screenshot](demo.png)
+
+## usage
+Specify a source file and optionally an input file:
+```
+brainfuck path/to/program.bf [path/to/input.txt]
+```
+### Code breakpoints:
+The `!` character will be treated as a breakpoint, stopping execution
+
+### Command list:
+`[brackets]` are optional parameters.
+- `step [n]`
+	- Step the progam n times (this is the default behavior when pressing enter with no command)
+- `run`
+	- Run the program until the end
+- `watch <cell> <value>`
+	- Create a breakpoint. Execution will stop when <cell> has <value>
+- `quit` | `q` | `exit`
+	- Exit the debugger

src/main.rs

@@ -171,7 +171,7 @@ impl BFInterpreter {
 		}
 		println!();
 		println!("{:?}. steps: {}", self.state, self.steps);
-		println!("output: {}", String::from_utf8_lossy(&self.output));
+		println!("output: {}", String::from_utf8_lossy(&self.output).blue());
 		// println!("input: {}", String::from_utf8_lossy(&self.input));
 	}