Hey. I'm totally new when it comes to programming in Perl. But I have to make a project and I have no idea how to do it. Maybe someone can help me. The script have to load several sequences in the format FASTA placed in one file. Example input file attached (for example 'gens.txt'): 
>1

AGTATCGGACCCGAAGACATTACGCTTAGAGACTTGAAAA CCTACAGTAAAGAAGCAGCGTCTGGATAT
+CTGGAAGACAA CGGATTGAAGCTTGTAGAAAAAGAAGCATACTCAGATGAT GTTCCAGAAGGACAGG
+TTGTCAAACAAAAACCAGCAGCAG GTACGGCAGTAAAGCCGGGAAACGAAGTTGAAGTGACATT CTC
+TCTCGGACCAGAGAAAAAACCTGCGAAAACAGTGAAA GAAAAGGTCAAGATCCCCTACGAACCAGAAA
+ATGAAGGGG ACGAGCTTCAAGTGCAAATCGCGGTTGACGATGCGGATCA

>2

CCATATCGGAGACAGCAGATGCTATTTGCTTCAGGACGAT GATTTCGTTCAAGTGACAGAAGACCATTC
+GCTTGTAAATG AACTGGTTCGCACTGGAGAGATTTCCAGAGAAGACGCTGA ACATCATCCGCGAAAA
+AATGTGTTGACGAAGGCGCTTGGA ACAGACCAGTTAGTCAGTATTGACACCCGTTCCTTTGATA TAG
+AACCCGGAGACAAACTGCTTCTATGTTCTGACGGACT GACAAATAAAGTGGAAGGCACTGAGTTAAAA
+GACATCCTG TGGACAAAGCCAATCAGAATGGCGGAGAAGGCGGAGAAGC

>3

ATAAAACAACGGTATTTGCCGGTCAGTCCGGTGTTGGGAA ATCCTCGCTTCTCAACGCGATCAGTCCGG
+AGCTCGGATTA AGAACAAACGAGATTTCCGAGCATTTGGGCCGCGGGAAAC ACACAACCCGCCACGT
+GGAGCTGATTCACACGTCCGGAGG TTTGGTTGCAGATACACCGGGATTCAGCTCGCTTGAATTT ACA
+GACATTGAGGAAGAAGAGCTGGGCTATACCTTCCCTG ATATCAGAGAAAAAAGCTCTTCATGCAAATT
+TAGAGGCTG TTTACATCTGAAAGAGCCGAAATGTGCGGTGAAACAAGCT

[download]
Then the script should check how similar are the sequences and print percent identity, and then it should also generate a consensus sequence. Any help would be very precious for me!

In reply to How to read and write several DNA sequences in the format FASTA placed in one file? by vouchsafing

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