Don't understand this error unexpected token identifier: set

sepiran

I'm following a video from 2018. Do i need to put set in a function ? error is line 38,1

extends Node

signal experience_gained(growth_data)

#Charater Stats
export (int) var max_hp = 12
export (int) var strenght = 8
export (int) var magic = 8

#Leveling System
export (int) var level = 1

var experience = 0
var experience_total = 0
var experience_required = get_required_experience(level + 1)

func get_required_experience(level):
	return round(pow(level, 1.8) + level * 4)

func gain_experience(amount):
	experience_total += amount
	experience += amount
	var growth_data = []
	while experience >= experience_required:
		experience -= experience_required
		growth_data.append([experience_required, experience_required])
		level_up()
		growth_data.append([experience, experience_required])
		emit_signal("experience_gained", growth_data)
	
	
func level_up():
	level += 1
	experience_required = get_required_experience(level + 1)

var stats = ['max_hp', 'strenght', 'magic']
var random_stat = stats[randi() % stats.size()]
set(random_stat, get(random_stat) + randi() % 4 + 2)

Bimbam

Lines 36-38 should be indented.

While lines 36 and 37 didn't complain, this is because you can declare variables outside functions in the global scope for that node (I assume that's the right terminology, or are singleton variables the 'true' global scope idk lol) . Most other commands would be expected to be inside a function to then be called at some point by one of the main process threads. In this instance these three lines should all still be within the level_up() scope, so should be indented.