It started faint and then it got brighter, fainter, brighter, and fainter again, as sunlight is reflected off of four sides of an oblong object.
희미해지다가 밝아지고,  다시 희미해지기를 반복하죠. 햇빛이 길쭉한 물체의  네 면에서 반사되는 것처럼요.