text: var fs = require("fs");
  
  // Write a function that logs a message, then executes
  // a function argument.
  
  // Write a function that runs a function argument if
  // its other argument is truthy.
  
  // Write a function that accepts a function argument and
  // a value, and returns a function that returns the result
  // of executing the function argument with the value.
  // This isn't as hard as it sounds!
  
  // Use fs.writeFile to log a message to a file called
  // log.txt. Are yo using callbacks anywhere? Where?
  