The Start() method

The Start() method caches a reference to the RawImage of the radar background image. Then, it caches a reference to the Transform component of the player's character (tagged as Player). This allows the scripted object to know about the position of the player's character in each frame. Next, the width and height of the radar image are cached so that the relative positions for blips can be calculated, based on the size of this background radar image. Finally, the size of each blip (blipWidth and blipHeight) is calculated using the blipSizePercentage public variable.