This is a react digital rain visualisation. You know, the green thing from the matrix.
You can try it here
Set them like this: http://digitalrain.wexo.systems/?<option_name1>=<value1>&<option_name2>=<value2>
For example: http://digitalrain.wexo.systems/?rainbow=true&bgColor=#fafafa
drawTimerMs:number = 60; // the milisecond speed of the update loop
fgColor:string = "#00ff00"; //foreground color
bgColor:string = "#000000"; //background color
tipColor:string="#FFFFFF"; //color of the last character
fontSize:number = 15; // how big should the characters be
bgAlpha:number=0.3;// trail length
rainbow:boolean=false;//should it be rainbow
maxCycle:number = 100;//rainbow cycle
rainCharacters: string = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYΑΒΓΔΕΖΗΘΙΚΛΜΝΞΟΠΡΣΤΥΦΧΨΩαβγδεζηθικλμνξοπρσςτυφχψωアァカサタナハマヤャラワガザダバパイィキシチニヒミリヰギジヂビピウゥクスツヌフムユュルグズヅブプエェケセテネヘメレヱゲゼデベペオォコソトノホモヨョロヲゴゾドボポヴッン"; //Possible characters
spawnChance:number = 0.05; //how many trails do you want