Python checking several if-conditions (find & replace word with number)

Hello dear Programmers,

I hope you can help me, with my programming-beginners-problem. I want to find a string (blue or red) and turn it into a number (1 or 2). I have in my Code 2 if-Conditions. Both of them are true. So I should get as an output the number 1 and 2. But depending on that where I put return, I always get either 1 or 2, but never 1 and 2 at the same time. What am I missing? Is it not possible to have 2 if-conditions at the same time? My Input-Text looks for example like this:

myInput = "I like the colors blue and red."

def check_color(document):

    for eachColor in document:

        if ("blue" in myInput):
            color_status = "1"
            #return color_status # only 1 as result

        if ("red" in myInput):
            color_status = "2"
            #return color_status # only 1 as result
        else:
            color_status = "0"
            #return color_status # only 1 as result
    #return color_status # only 2 as result

Without any return --> Output: None

function call

color_output = check_color(myInput)
print(color_output)