==================
Simple For Loop
==================

for i in [1, 2, 3] {
  (output i)
}

---

(root
  (statement
    (for
      (identifier)
      (expression
        (value
          (list
            (expression
              (value
                (integer)))
            (expression
              (value
                (integer)))
            (expression
              (value
                (integer))))))
      (statement
        (expression
          (tool
            (expression
              (identifier))))))))

==================
Nested For Loop
==================

for list in list_of_lists {
  for item in list {
    (output item)
  }
}

---

(root
  (statement
    (for
      (identifier)
      (expression
        (identifier))
      (statement
        (for
          (identifier)
          (expression
            (identifier))
          (statement
            (expression
              (tool
                (expression
                  (identifier))))))))))