Direction

This is a esolang that uses 2d syntax, plus orthogonal directions

The but

every direction command when you step on it it gets deleted

Commands

<>^v: direction commands
I: get input and push it to stack
?: pops from stack and if that is 0 turn left >0 turn right, also doesnt disappear
O: pops from stack and outputs it
D: duplicate top of stack
+: add top two
-: sub top two in b-a where a is top
*: mult top two
/: div top two in b/a where a is top
1: add one to stack
0: add zero to stack
S: make it so if next command will disappear, make it not
N: make it so if next command wont disappear, make it
E: stop program

Examples

321 program

This program counts down from inclusive three (3) to inclusive one (1) and continuously outputs the counter state:

111++SvS      <
      D        
     v?DO1-Sv S
     E      S  
            >S^

Cat Program

This numeric cat program repeats until a zero (0) input is committed:

Sv      <
 S      S
 >IDOSv ^
        S
     E?S^

Truth-Machine

The following furnishes a truth-machine:

IDOSvSOD<
    D   S
   E?S>S^

Interpreter

• Common Lisp implementation of the Direction programming language.