The colors to use must be white, blue, yellow, gold, and purple. They should be the pastel colors or very pleasant. Do not use the dark shades of these colors. Write down your feedback when you do this. You can decide what shape and method is the best for you.
Some people have problems visualizing.
You can make a model of the wards you want to set up out of string. You then put a picture of your home and the people you want to protect in the model. You can include the car, pets and anything you want to keep safe. You then write down what you will think as the key to unlock the wards. It is a very simple lesson and has been used for centuries.