Pretty Big Mistake

The large Stevenson marching band marched through the gates of the Franklin High School football field. The band continued marching to the other side of the field, and the color guard remained by the gates. "Now entering the field," the announcer said, "from the other side of I-96, Livonia Stevenson." I, along with the rest of the color guard, grabbed our flags and set them on the side lines. We were all in a rush, so we could get on the field on time.
The conductor counted off and the show started. I lifted my flag and proceeded to go through all the moves. Counting in my head and trying to stay in step with everyone. The first part was over and I was already out of breath. I stood still for until the conductor counted off again, signaling for part two to start. I took a deep breath and moved my flag in front of my face, and yet again went through the movements.
I went to the sideline to switch my flag. I carefully placed the large purple flag on the ground and picked up another flag that was lying in front of me. I moved back from the sideline and look up at my flag. Something's different, I thought to myself. I looked around at everyone else's flags. Theirs were all purple, where as mine was bright green.
I began to freak out, like any person would. I didn't know what to do. I was already too far away from the sideline to change my flag to the purple one. Just keep going, I thought to myself, everything will be alright. I continued to march back still shaking because of my mistake. I had to still march the whole show. Part two ended and everyone stood still. I was breathing exceptionally hard because I was so nervous.
I marched to the sideline again, but this time I didn't have to swicth the flag because I already had the green one. Everyone lifted up a green flag, and I also had a green flag. I felt relieved that the show was going back to normal. The show came to a close, and I just began to laugh because of the stupid mistake I made.
As we were marching off everyone felt the need to tell me that I had the wrong flag the whole second part (not like I didn't already know). I felt really embarrassed, but soon got over it because there was nothing I could do about it.