'''
Motif finding

It's often useful to know if a given DNA sequence contains a specific 
motif: in Python, a variable should be `True` if the motif is found 
and `False` otherwise. DNA sequences are strings composed of the characters 
A, T, C, and G. A motif is a specific sequence of these characters. 
This is an example of how you can find this:
'''

dna_sequence = "ATGCGATACGCTTGA"
motif = "GCT"

if motif in dna_sequence:
    found = True
else:
    found = False

print("Motif found:", found)

'''
We might want to do this for multiple DNA sequences or multiple motifs, and 
different combinations of these. This is where functions come in: with functions, 
this logic can easily be applied to any combination of DNA sequences and motifs.
'''

dna_sequence = "ATGCGATACGCTTGA"
motif = "GCT"

def find_motif(dna, motif):
    found = False
    
    # Your code here
    
    return found

found = find_motif(dna_sequence, motif)

print("Motif found:", found)