this is normal for young hens that just started to lay eggs. she wants to build her own nest. she'll need just a few days to learn where the nesting boxes are. this happens every year to me with my hens that just start to lay their first eggs. buut i sometimes let them 'decide' where they want to lay. all hens want private nests or nesting boxes. last year one my hens kept laying outside the nesting boxes and i was too busy with my exams that i forgot to check where she was laying. one day i noticed that she was missing in my flock and i got worried because i thought any fox could have killed her. anyway.. time passed and one morning my mom came to my bed and woke me up saying that i should followed her because she had a surprise for me. i did that and i followed her to my chicken coop and here she was. waaw. the 'missing' hen came with 13 chicks. she layed the eggs all by herself , went broody and hatched them. all the same colour. i was very happy. greeting from Albania.
p.s. this is my first time in this forum.
. hope i helped you