void setup() 
{
    Serial.begin(9600);
}

void loop() 
{
    Serial.println("Input 1 and press Enter:");
    while (Serial.available() == 0) {}     // Wait for data available
    String teststr = Serial.readString();  // Read until timeout
    teststr.trim();                        // Remove any \r \n whitespace at the end of the String

    if (teststr == "1") 
    {
        Serial.println("Input any character to continue:");
        while (Serial.available() == 0) {}  // Wait for the user to input any character
        char inputChar = Serial.read();    // Read a single character
        //Serial.readString();               // Clear remaining characters in the buffer

        if (inputChar) 
        {                                  // Check if a character was entered
            String teststr2;
            bool validColor = false;
            do                            //process eather ways
            {
                Serial.println("Select the color of the part (Red, Green, Blue, Orange):");
                Serial.println(Serial.readString());
                while (Serial.available() == 0) {} // Wait for color input
                teststr2 = Serial.readString();  
                teststr2.trim();                // Remove extra spaces or newline characters




                // Convert input to lowercase for case-insensitivity
                teststr2.toLowerCase();

                if (teststr2 == "red") 
                {
                    Serial.println("The red part has been picked and placed in the red bin.\n");
                    validColor = true;
                } 
                else if (teststr2 == "green") 
                {
                    Serial.println("The green part has been picked and placed in the green bin.\n");
                    validColor = true;
                } 
                else if (teststr2 == "blue") 
                {
                    Serial.println("The blue part has been picked and placed in the blue bin.\n");
                    validColor = true;
                } 
                else if (teststr2 == "orange") 
                {
                    Serial.println("The orange part has been picked and placed in the orange bin.\n");
                    validColor = true;
                } 
                else 
                {
                    Serial.println("Error: Invalid color. Please try again.\n");
                }
            } while (!validColor);  // Repeat until a valid color is entered
        }
    } 
    else 
    {
        Serial.println("Invalid input. Try again.\n");
    }
}