demo.py

'''
Function takes an array of ints as parameter.
Returns True if the sequence.. 1, 3, 4 .. appears in the array somewhere.
'''

def sequenceMatches(arrayOfNumbers):
    for index in range(len(arrayOfNumbers)-2):
        if arrayOfNumbers[index] == 1 and arrayOfNumbers[index+1] == 2 and arrayOfNumbers[index+2] == 3:
            return True
        
    return False
    
print(sequenceMatches([3,4,5,56,6,6,5,6,6,6,2,1,2,3]));