We were talking about the signs so don't you see how the composition of air is just so perfect that we human can breath and live easily.
Classic chicken/egg paradox — the obvious answer is that the atmosphere was already here and life forms evolved to make use of it.
Don't you see the sun rises from East every day ( Why not West or any other direction).
No, the sun doesn't "rise in the east" — you're anthropomorphizing the natural world. The sun is stationary and the counter clockwise rotation of the earth on its axis gives the appearance that the sun is "rising".
Don't you see how moon changes its stages.
No, we are simply observing it in different stages of its 28 day cycle of rotation. The moon stays the same.
How are you created and from what are you created?
Star dust, which we call "matter", exists throughout the universe. On our planet the particular chemistry allowed for the gradual development of complex materials such as amino acids. The building blocks of life originated in chemical reactions combined with electrical current and radiation.
Is this all accidental?
Not entirely because the behavior of physical particles and chemical reactions occur in predictable ways. But the fact that our planet supports any particular form of life is clearly accidental. What "purpose" would it serve?