Run this GDScript:
if !FileAccess.file_exists("res://hello_world.elf"):
var buffer = Sandbox.download_program("hello_world")
fa = FileAccess.open("res://hello_world.elf", FileAccess.WRITE)
fa.store_buffer(buffer)
fa.close()
var hello = Node.new()
hello.set_script(load("res://hello_world.elf"))
Prints "Hello, world!"
print(hello.hello_world())
Calculates the nth Fibonacci number:
print(hello.fibonacci(256))