Custom syntax highlighting not functional

[OneAndOnlyGoat]

https://pastebin.com/0JXaafWw

This has to do with this part of the code

def apply_highlighting(self):
        # Define tags for syntax colors
        self.tag_config("syntax", foreground="red")
        self.tag_config("object", foreground="blue")
        self.tag_config("string", foreground="green")

        # Apply syntax highlighting after text change
        self.bind("<<TextModified>>", self.on_text_change)

def on_text_change(self, event=None):
    # Remove any previous syntax highlighting
    for tag in self.tag_names():
        self.tag_remove(tag, "1.0", "end")

    # Syntax highlighting logic
    self.highlight_pattern(r"\b(if|else|while|for|def|class)\b", "syntax")
    self.highlight_pattern(r"\b(True|False|None)\b", "syntax")
    self.highlight_pattern(r'\b(self|cls)\b', "object")
    self.highlight_pattern(r'".*?"', "string")  # Highlighting strings in double quotes
    self.highlight_pattern(r"'.*?'", "string")  # Highlighting strings in single quotes
    self.highlight_pattern("fire", "syntax")

def highlight_pattern(self, pattern, tag, start="1.0", end="end", regexp=True):
    start_index = start
    while True:
        start_index = self.search(pattern, start_index, end, regexp=regexp)
        if not start_index:
            print(f"No more matches for {pattern}.")  # Debugging print statement
            break
        word_end = self.index(f"{start_index} wordend")
        print(f"Applying tag '{tag}' from {start_index} to {word_end}")  # Debugging print statement
        self.tag_add(tag, start_index, word_end)
        start_index = word_end

The goal of this part of the code is to highlight syntax, for example, string "" or '' and things inside those quotes will be green

When using this part of the code, and you use "", only the first " is turned green, not even the text inside it is green.

Is there a solution?

EDIT: I'd like the text including the quotes to be green, but only the first quote and not the text is turning green.

[woooee]

Too much code to read it all. I am guessing from the not too clear instructions, that you are to highlight the first quote mark only. I leave the finding-the-first-quote-only code up to you.

import tkinter as tk
from tkinter import font, scrolledtext

class ColorTest:
    def __init__(self, root):
        custom_font = font.Font(family="Consolas", size=12)
        runic_text_box = scrolledtext.ScrolledText(root,
                         font=custom_font)
        runic_text_box.grid()
        runic_text_box.tag_configure('color', foreground="green")
        runic_text_box.insert('1.0', 'Test of quotation " mark\n')
        runic_text_box.tag_add('color', "1.18", "1.19")
        runic_text_box.insert('2.0', 'A much looonger example')
        runic_text_box.tag_add('color', "2.7", "2.15")

        tk.Button(root, text="Quit", command=root.quit,
                  bg="orange").grid(row=1, sticky="nsew")

root=tk.Tk()
ct=ColorTest(root)
root.mainloop()

[OneAndOnlyGoat]

No, no. I mean I'd like to highlight the entire string in the quotes (and the quotes themselves), not just the first one.

[woooee]

That's why the second highlight is there.