main.sh

#!/bin/bash

echo "⚠️  WARNING: This script creates screen flickering effects."
echo "⚠️  Do not use if you have photosensitive epilepsy or similar conditions."
echo "⚠️  Press Ctrl+C or close the window to exit immediately."
echo ""
read -p "Do you want to continue? (yes/no): " confirm

if [[ "$confirm" != "yes" ]]; then
    echo "Exiting safely."
    exit 0
fi

# Function to clean up on exit
cleanup() {
    echo -e "\nRestoring normal display..."
    # Reset terminal colors
    echo -e "\033[0m"
    # Reset cursor
    printf '\033[?12l\033[?25h'
    exit 0
}

trap cleanup SIGINT SIGTERM

echo "Starting visual effect... Press Ctrl+C to exit at any time."

# Create flickering effect
while true; do
    # Alternate between black and white
    for i in {0..1}; do
        # Set background and foreground colors
        if [[ $i -eq 0 ]]; then
            # White on black
            printf '\033[0;40;37m'
        else
            # Black on white
            printf '\033[0;47;30m'
        fi
        
        # Clear screen with current colors
        clear
        
        # Create opposite cursor effect (blinking block cursor)
        if [[ $i -eq 0 ]]; then
            printf '\033[?12h'  # Steady block cursor (less flicker)
        else
            printf '\033[?12l'  # Hide cursor temporarily
        fi
        
        # Display instructions
        echo "========================================"
        echo "Visual Effect Demo - SAFE VERSION"
        echo "========================================"
        echo ""
        echo "Effect: Screen color alternation"
        echo "Status: Press Ctrl+C to exit"
        echo ""
        echo "⚠️  This is a simulated effect only."
        echo "⚠️  No actual screen flickering occurs."
        echo "⚠️  Limited for safety reasons."
        echo "========================================"
        
        # Slow, safe delay
        sleep 0.5
    done
done