Zigzag Shoal

<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 500 500" width="100%"><defs><pattern id="blob-pattern" patternUnits="userSpaceOnUse" width="24" height="16"><path d="M0 10L12 2L24 10L24 15L12 7L0 15Z" fill="#1e8fe5" fill-rule="evenodd"/></pattern></defs><path d="M461.5,310Q458,370,403,395Q348,420,299,444.5Q250,469,199,448Q148,427,95.5,398.5Q43,370,26.5,310Q10,250,23.5,188.5Q37,127,95,104.5Q153,82,201.5,56.5Q250,31,308.5,39Q367,47,396.5,97.5Q426,148,445.5,199Q465,250,461.5,310Z" fill="url(#blob-pattern)"/></svg>

.blob {
  width: 500px;
  height: 500px;
  clip-path: path("M461.5,310Q458,370,403,395Q348,420,299,444.5Q250,469,199,448Q148,427,95.5,398.5Q43,370,26.5,310Q10,250,23.5,188.5Q37,127,95,104.5Q153,82,201.5,56.5Q250,31,308.5,39Q367,47,396.5,97.5Q426,148,445.5,199Q465,250,461.5,310Z");
}

/**
 * Blob — generated by blobs.app.
 *
 * Drop this file into your project and render <Blob /> anywhere.
 */
import { useId } from 'react';

export interface BlobProps {
  /** Rendered width and height. A number is treated as px. Defaults to 100%. */
  size?: number | string;
  /** Class name for the root svg element. */
  className?: string;
  /** Accessible name. Without it the graphic is hidden from assistive tech. */
  title?: string;
}

export function Blob({ size = '100%', className, title }: BlobProps) {
  // Unique per instance, so two blobs on one page never share a def id.
  const uid = useId().replace(/[^a-zA-Z0-9]/g, '');
  const titleId = `blob-title-${uid}`;
  const patternId = `blob-pattern-${uid}`;

  return (
    <svg
      xmlns="http://www.w3.org/2000/svg"
      viewBox="0 0 500 500"
      width={size}
      height={size}
      className={className}
      role={title ? 'img' : undefined}
      aria-labelledby={title ? titleId : undefined}
      aria-hidden={title ? undefined : true}
    >
      {title ? <title id={titleId}>{title}</title> : null}
      <defs>
        <pattern id={patternId} patternUnits="userSpaceOnUse" width="24" height="16">
          <path d="M0 10L12 2L24 10L24 15L12 7L0 15Z" fill="#1e8fe5" fillRule="evenodd" />
        </pattern>
      </defs>
      <path
        d="M461.5,310Q458,370,403,395Q348,420,299,444.5Q250,469,199,448Q148,427,95.5,398.5Q43,370,26.5,310Q10,250,23.5,188.5Q37,127,95,104.5Q153,82,201.5,56.5Q250,31,308.5,39Q367,47,396.5,97.5Q426,148,445.5,199Q465,250,461.5,310Z"
        fill={`url(#${patternId})`}
      />
    </svg>
  );
}

export default Blob;

// Generated by blobs.app.
//
// Paint the blob:
//   CustomPaint(painter: BlobPainter(), size: const Size(300, 300))
//
// Or clip a widget to it:
//   ClipPath(clipper: BlobClipper(), child: child)

import 'dart:ui' as ui;

import 'package:flutter/material.dart';

/// The blob outline, scaled from its 500x500 design space to [size].
Path buildBlobPath(Size size) {
  final double sx = size.width / 500.0;
  final double sy = size.height / 500.0;
  final Path path = Path();
  path.moveTo(461.5 * sx, 310.0 * sy);
  path.quadraticBezierTo(458.0 * sx, 370.0 * sy, 403.0 * sx, 395.0 * sy);
  path.quadraticBezierTo(348.0 * sx, 420.0 * sy, 299.0 * sx, 444.5 * sy);
  path.quadraticBezierTo(250.0 * sx, 469.0 * sy, 199.0 * sx, 448.0 * sy);
  path.quadraticBezierTo(148.0 * sx, 427.0 * sy, 95.5 * sx, 398.5 * sy);
  path.quadraticBezierTo(43.0 * sx, 370.0 * sy, 26.5 * sx, 310.0 * sy);
  path.quadraticBezierTo(10.0 * sx, 250.0 * sy, 23.5 * sx, 188.5 * sy);
  path.quadraticBezierTo(37.0 * sx, 127.0 * sy, 95.0 * sx, 104.5 * sy);
  path.quadraticBezierTo(153.0 * sx, 82.0 * sy, 201.5 * sx, 56.5 * sy);
  path.quadraticBezierTo(250.0 * sx, 31.0 * sy, 308.5 * sx, 39.0 * sy);
  path.quadraticBezierTo(367.0 * sx, 47.0 * sy, 396.5 * sx, 97.5 * sy);
  path.quadraticBezierTo(426.0 * sx, 148.0 * sy, 445.5 * sx, 199.0 * sy);
  path.quadraticBezierTo(465.0 * sx, 250.0 * sy, 461.5 * sx, 310.0 * sy);
  path.close();
  return path;
}

class BlobPainter extends CustomPainter {
  const BlobPainter();

  @override
  void paint(Canvas canvas, Size size) {
    final Path path = buildBlobPath(size);
    // Pattern and image fills are not supported in this exporter; use the SVG export.
    final Paint paint = Paint()
      ..isAntiAlias = true
      ..color = const Color(0xFF1E8FE5);
    canvas.drawPath(path, paint);
  }

  @override
  bool shouldRepaint(covariant BlobPainter oldDelegate) => false;
}

/// Clips any widget to the same shape: ClipPath(clipper: BlobClipper(), ...).
class BlobClipper extends CustomClipper<Path> {
  const BlobClipper();

  @override
  Path getClip(Size size) => buildBlobPath(size);

  @override
  bool shouldReclip(covariant CustomClipper<Path> oldClipper) => false;
}