Typewriter text effect Unity

using UnityEngine;
using UnityEngine.UI;

public class Typewriter : MonoBehaviour {
    public float timeBetweenCharacters = 2;

    private Text textField;
    private string originalText;
    private int position = 0;
    private float time;

    void Start() {
        textField = GetComponent<Text>();
        originalText = ParseText(textField.text);
        textField.text = "";
    }

    string ParseText(string text) {
        string t = text;
        t = t.Replace("[device]", SystemInfo.deviceName);
        t = t.Replace("[name]", "Felix");
        return t;
    }

    void Update () {
        if(position < originalText.Length && time <= 0) {
            char c = originalText[position];

            if(c == '|') {
                textField.text = textField.text.Substring(0,textField.text.Length-1);
            } else if (c == '[') {
                textField.color = Color.red;
            } else if (c == ']') {
                textField.color = Color.white;
            } else {
                textField.text += c;
            }

            position++;
            time = timeBetweenCharacters;
        }
        if(time > 0)
            time -= Time.deltaTime;
    }
}