How do you sketch 2 ways corners stair

[komchan.prakaiborisuth]

I cloud not sketch the 2 ways corner stair, in the attached images can anyone provide me a solution how to sketch this type of stair

[barthbradley]

Something like this?

[komchan.prakaiborisuth]

Here is the one that we did but it is created from floor.

[barthbradley · Accepted solution]

Don't forget to add the Stair Arrow.