text: #!/usr/bin/env node
  var PiTank = require('../src/pi-tank'),
      fs = require('fs'),
      path = require('path'),
      script = [];
  
  if (process.argv[2]) {
      if (!fs.existsSync(process.argv[2])) {
          console.error('\x1b[31m[error]\x1b[0m %s not found', process.argv[2]);
          return;
      }
      script = eval(fs.readFileSync(process.argv[2], 'UTF-8'));
  }
  
  PiTank().play(script);