how to draw 3 dimension using perspective one missing point.

Hallo players stemit, welcome to my account, this time masi by drawing / painting perspective one point missing the three-dimensional image, this time I want to describe a room where in the room was already in color.
Let's explain the steps for creating a single point perspective missing in the room:

1. The first step is to make the diagonal line draw the line from the top corner to the bottom corner so as to form the letter X.
   
2. The second is to make a square exactly at the point in the form according to the need.
   
3. Draw a line, from the corner of the square.
   
4. Here's the picture
   
5. Here's the picture
   
6. Here's the picture
   
7. Finally color as you please according to the color that is in the room.
   
   This is the simplest of my ways in creating a missing point perspective, hopefully useful.