whoops. how about not maxing out cpu ¯\_(ツ)_/¯

scone_demo.d

import core.thread;
import scone;
import scone.misc.ticker;
import std.math;
import std.stdio;

void main()
{
    bool loop = true;
    int l = 0;
    window.title = "Example 3";
    window.resize(60, 20);

    auto ticker = Ticker(60);

    //gameloop
    while(loop)
    {
        //only update if a tick has passed
        //will only be run 60 times per second
        foreach(tick; 0 .. ticker.ticks)
        {
            window.clear();

            //check if escape is pressed, and if so, stop gameloop
            foreach(input; window.getInputs)
            {
                if(input.key == SK.escape)
                {
                    loop = false;
                }
            }

            enum d = 13;

            foreach(int v; 0 .. 360)
            {
                real x = (cos(v*PI/180)*d) * sin(l * PI / 180);
                real y = (sin(v*PI/180)*d) /* sin(l * PI / 180) /*/* 1/2;

                char c = (v >= 280 && v < 340) ? '*' : ' ';
                Color col = (v >= 110 && v < 135+90) ? Color.yellow_dark : Color.yellow;

                window.write(cast(int)(window.w/2+x),cast(int)(window.h/2+y), fg(Color.white), bg(col), c);
            }

            l += 1;
            l %= 180;

            window.print();
        }
        
        Thread.sleep(10.msecs);
    }
}