%数学之心
figure;
clc;
x=-2:0.01:2;
y=sqrt(2*sqrt(x.^2)-x.^2);
z=asin(abs(x)-1)-pi./2;
plot(x,y);
grid on;
hold on;%在一个图中画多个图
plot(x,z);
title('');
legend('心');

2021.2.25追加

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>***，我爱你！做我女朋友吧！</title>
    <style type="text/css">
        .font1{

            font-family:Arial,Helvetica,sans-serif;

            font-size:1em;

            vertical-align:middle;

            font-weight:normal

        }
    </style>
</head>

<body>
<canvas id="c"></canvas>

<h1>
    ***，我爱你！做我女朋友吧！
</h1>

<script>
    var b = document.body;
    var c = document.getElementsByTagName('canvas')[0];
    var a = c.getContext('2d');
    document.body.clientWidth;

    with(m=Math)C=cos,S=sin,P=pow,R=random;c.width=c.height=f=600;h=-250;function p(a,b,c){if(c>60)return[S(a*7)*(13+5/(.2+P(b*4,4)))-S(b)*50,b*f+50,625+C(a*7)*(13+5/(.2+P(b*4,4)))+b*400,a*1-b/2,a];A=a*2-1;B=b*2-1;if(A*A+B*B<1){if(c>37){n=(j=c&1)?6:4;o=.5/(a+.01)+C(b*125)*3-a*300;w=b*h;return[o*C(n)+w*S(n)+j*610-390,o*S(n)-w*C(n)+550-j*350,1180+C(B+A)*99-j*300,.4-a*.1+P(1-B*B,-h*6)*.15-a*b*.4+C(a+b)/5+P(C((o*(a+1)+(B>0?w:-w))/25),30)*.1*(1-B*B),o/1e3+.7-o*w*3e-6]}if(c>32){c=c*1.16-.15;o=a*45-20;w=b*b*h;z=o*S(c)+w*C(c)+620;return[o*C(c)-w*S(c),28+C(B*.5)*99-b*b*b*60-z/2-h,z,(b*b*.3+P((1-(A*A)),7)*.15+.3)*b,b*.7]}o=A*(2-b)*(80-c*2);w=99-C(A)*120-C(b)*(-h-c*4.9)+C(P(1-b,7))*50+c*2;z=o*S(c)+w*C(c)+700;return[o*C(c)-w*S(c),B*99-C(P(b, 7))*50-c/3-z/1.35+450,z,(1-b/1.2)*.9+a*.1, P((1-b),20)/4+.05]}}setInterval('for(i=0;i<1e4;i++)if(s=p(R(),R(),i%46/.74)){z=s[2];x=~~(s[0]*f/z-h);y=~~(s[1]*f/z-h);if(!m[q=y*f+x]|m[q]>z)m[q]=z,a.fillStyle="rgb("+~(s[3]*h)+","+~(s[4]*h)+","+~(s[3]*s[3]*-80)+")",a.fillRect(x,y,1,1)}',0)
</script>

</body>
</html>

效果：

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表白专用代码拿走不谢