This tutorial will guide you how to develop simple DIY radar using Arduino and Processing. Actually, there have a lot of tutorial you can refer to, but most of them is using ultrasonic sensor. In this tutorial, I will using Analog Distance Sensor (10-80cm).
This video will show you how to develop simple DIY radar using Arduino (Maker UNO) and Processing IDE.
This is the sample code for Processing and Arduino used in the video.