ght)) / window.innerHeight) * ALPHA_DOWN_RANGE;
                    blendTo(l, d);
                }
            };

            const blendTo = (x, y) => {
                leftTrack.alpha = mouseX(x);
                downTrack.alpha = mouseY(y);
            }

        })();

        function Smooth(f,t){var p=performance,b=p.now(),o=f,s=0,m,n,x,d,k=f;return function(v){n=p.now()-b;m=t*t/n/n;d=o-f;x=s*t+d+d;if(n>0)k=n<t?o-x/m/t*n+(x+x-d)/m-s*n-d:o;if(v!=void 0&&v!=o){f=k;b+=n;o=v;s=n>0&&n<t?s+3*x/m/t-(4*x-d