外 is written in 5 strokes, following the standard Chinese stroke order. Start from the radical 夕, then complete the remaining strokes.
Stroke order matters in Chinese: it keeps the character balanced, and it is how dictionaries and handwriting input methods expect a character to be written.
外 is an ideographic compound. Night-time 夕 divinations 卜; the supernatural, the foreign.
Radical: 夕 + 2 more strokes
wài外