retro style error page with 404 message, login screen, and loading animation

interface computer presentation screenshot multimedia document diagram drawing cartoon pattern writing design sketch circle brand line font text plan map error retro page design 404 message login screen animation loading pastel grid vector background vintage aesthetic pixel art technology computer internet failure interface digital software system web glitch problem colorful retrofuturism quirky playful creative fun errorpage style browser ui pastelcolor icon nostalgic classic template screenart