canvas = { regen const w = width + 28, h = width / 1.9; const context = DOM.context2d(w, h, 1); const image = context.getImageData(0, 0, w, h); const indexes = []; let frame = 0; const red = [178, 34, 52], white = [255, 255, 255], blue = [60, 59, 110] const unionWidth = w * .76 / 1.9 context.canvas.style.margin = "0 -14px"; context.canvas.style.imageRendering = "pixelated"; let stripe = 1 while (stripe <= 14) { const stripeColor = stripe % 2 ? red : white const unionColor = stripe < 7 ? blue : stripeColor const stripeCenter = Math.round(h * (stripe * 2 - 1) / 26) visit(unionWidth - w * .01, stripeCenter, ...unionColor); visit(unionWidth + w * .01, stripeCenter, ...stripeColor); console.log(h*stripe/13, stripe) stripe++ } // visit(w * .76/1.9, h >> 1, ...white); function visit(x, y, r, g, b) { if (x < 0 || x >= w || y < 0 || y >= h) return; const i = y * w + x, j = i << 2; if (image.data[j + 3] === 0) { image.data[j + 0] = r + (Math.random() < 0.5 ? -1 : 1); image.data[j + 1] = g + (Math.random() < 0.5 ? -1 : 1); image.data[j + 2] = b + (Math.random() < 0.5 ? -1 : 1); image.data[j + 3] = 255; indexes.push(i); } } while (indexes.length) { const i = Math.random() * indexes.length | 0; const j = indexes[i]; const k = indexes.pop(); if (i < indexes.length) indexes[i] = k; const r = image.data[(j << 2) + 0]; const g = image.data[(j << 2) + 1]; const b = image.data[(j << 2) + 2]; const x = j % w, y = j / w | 0; visit(x - 1, y, r, g, b); visit(x + 1, y, r, g, b); visit(x, y - 1, r, g, b); visit(x, y + 1, r, g, b); if (!(++frame % 10000)) { context.putImageData(image, 0, 0); yield context.canvas; } } context.putImageData(image, 0, 0); yield context.canvas; }