== Supported Runtime Script commands in Moon OS
prt, let, slp, inp, rnd
add, sub, mul, div, mod
jmp, jeq, jne, jgt, jlt
int, str, typ, tim
len, pol, pop, psh, put, get
clr, drw, pxl
def, end, ret, cal

~ not supported:
ife, ifg, els, fin
for, nxt
key, del
prs, lod, sav

~ only in Moon OS:
led V
lib <API> [$V*] [N?]

~lib APIs:
os.get_home_path (path)
os.get_current_path (path)
os.set_current_path ($path)
os.delete_path ($path)
os.make_dir ($path, $name)
os.get_file_list ($path)
os.get_file_type ($path, $name, type_str)
os.read_file ($path, $name, content)
os.write_file ($path, $name, $content)
os.get_os_info (info)
os.get_sys_info (info)
util.get_path_by_str ($path_str, $is_file, $skip_verify, path)
util.get_real_path ($path, path)
util.verify_path ($path, $is_file, is_valid)
dev.set_led ($val)
term.prev_line
term.clear_line
term.reverse
term.reset
term.color_print ($text, $fg_color, $bg_color)
term.set_prt_delay ($enable)
term.get_width (width)
term.get_height (height)
term.move_cursor ($dx, $dy)

== Runtime Script resources
Tutorial: https://siwei.dev/doc/runtime/
Cheatsheet: https://siwei.dev/doc/RuntimeScriptCheatSheet.pdf