Generated by XState Viz: https://xstate.js.org/viz

machine.js

const loop = Machine({
  context: { x: 3 },
  initial: 'while (x > 0)',
  states: {
    "while (x > 0)": {
      on: {
        EVAL: [
          {
            target: "x--",
            cond(ctx, evt) {
              return ctx.x > 0;
            }
          },
          { target: "done",
            cond(ctx, evt) {
              return ctx.x > 0 !== true;
            } }
        ]
      }
    },
    "x--": {
      on: {
        EVAL: {
          target: "while (x > 0)",
          actions(ctx, event) {
            ctx.x--;
          }
        }
      }
    },
    done: { type: "final" }
  }
});