将原始序列或FASTA格式的序列拷贝到以下区域中
>sample sequence ggggggggggaaaaaaaaaattttttttttccccccccccggggggggggaaaaaaaaaattttttttttccccccccccggggggggggaaaaaaaaaattttttttttccccccccccggggggggggaaaaaaaaaattttttttttccccccccccggggggggggaaaaaaaaaattttttttttcccccccccc

• 计算 g's a's t's c's n's g's or a's g's or t's g's or c's g's or n's a's or t's a's or c's a's or n's t's or c's t's or n's c's or n's 的比例，使用的滑动窗口大小为 10 20 50 100 200 300 400 500 碱基