"Oh, there is no bad news - just --".
"-- I knew it! --".
"-- That you tend to make your circles too small", Valerion said, smiling with his eyes. "Don't worry, it is a common mistake, especially for beginners", he continued, "as it is usually caused by self-consciousness, nervousness, and the like. Look" - he gestured at the lines on the wall, slowly moving one hand from left to right - "the circles you drew in the beginning are much smaller than the later ones".
"You're right", Adrien recognized, his head tilted, "I was a bit tense this morning". He walked towards the wall to examine his own work, comparing one circle to the other with his fingers. "Yeah, that one is almost a full span bigger than the first", he commented quietly. He chuckled; then his smile faded away, and he stood still as he stared through the wall, the sound of the gears turning in his head almost audible in the sharp silence of the stone walls.