You can start to communicate with the entities by asking a question and determining which symbol will mean a "Yes" or a "No".
I have established that the letter X means a "Yes". On this photo the entities have once again surprised me with their unexpected way of creating an X. They built a formation which results in an X.
Go to the next picture where I have shown the X with the help of two black lines.
Further down (the 8th row from the bottom up) you will find a photo with a golden X flashing in the dark sky.