The user is asking for an inline SVG illustration of a pelican riding a bicycle, and per system constraints it needs to be written into index.html in /tmp/ws. I'll create a self-contained index.html containing inline SVG.

Let me design the SVG. Pelican on a bike: two wheels (circles), frame, pedals, and a pelican body with a big beak and pouch. I'll make it somewhat elaborate.

Coordinate sketch (viewBox 0 0 800 600):

- Ground line at y=480
- Rear wheel center (220, 440), r=100… wheel is maybe r=90. Front wheel center (580, 440), r=90.
- Frame: bottom bracket at (370, 440) (pedal axle). Chainstays to rear hub (220,440). Seat tube going up to seat (330, 300). Down tube from bottom bracket to head tube (540, 310). Top tube from seat to head tube. Fork from head tube to front hub (580, 440). Handlebar at (555, 280).
- Saddle at (320, 290).
- Pelican sits on saddle: body is an ellipse centered at (330, 230), white with gray shading. Legs from body down to pedals.
- Head at upper right (450, 130), long neck curve from body to head.
- Big beak: upper mandible as long triangle to the right, with orange pouch hanging below it.
- Tail feathers behind.
- Pedals, crank, chain.
- Sky background, sun, clouds, maybe grass.

Let me write the coordinates:

Wheels: r=95, centers rear (230,435), front (590,435). Spokes: lines. Tire as stroke circle width 14, rim as inner circle.

Bottom bracket (pedal axle): (400, 435). Chainring circle r=28. Crank arm to pedal (430, 465), and opposite pedal (370, 405).

Frame:
- Rear hub (230,435) to BB (400,435) — chainstay.
- Rear hub to seat cluster (350, 300) — seatstay.
- BB (400,435) to head tube top (545, 300) — down tube.
- Seat cluster (350,300) to head (545,300)? That's top tube. Actually seat cluster is (355, 295), top tube to (540, 300).
- Head tube: (540, 290) to (560, 340)? Fork from head tube down to front hub (590, 435).
- Handlebar stem up from (540, 290) to (530, 255), handlebar curve.
- Seatpost from (355,295) up to saddle (340, 265). Saddle: rounded rect/ellipse.

Pelican:
- Sitting on saddle: body ellipse center (350, 205), rx 60, ry 48, slightly rotated.
- Wings: path on side of body.
- Tail: back-left of body, pointing lower-left toward saddle.
- Legs: from body bottom (380, 240) down to pedal (430, 465); other leg to opposite pedal (370, 405). Pelican legs are orange, webbed feet on pedals.
- Neck: thick curve path from front of body (400, 185) up to head (470, 110).
- Head: circle at (480, 105), r 22.
- Eye: dot at (487, 98).
- Beak: upper mandible — long shape from head (490, 100) to tip (640, 130). Lower pouch: orange path from beak base down and back to tip, forming a big pouch.
- Maybe some feathers.

Ground: line/grass at y=530. Wheels touch ground at 435+95=530. Good, ground y=530.

Add sun, clouds.

Colors: frame red (#d94f3d) or teal; pelican white body #fafafa, outline #3a3a3a? Softer: body #fff with #d8d8e0 shading, outline stroke #444? Cartoon flat style, no thick outlines, or subtle.

Let me write the file.

SVG details:

```svg
<svg viewBox="0 0 800 600">
  <rect sky gradient />
  sun circle (90,90) r 45 fill #ffd66b
  clouds: groups of ellipses
  hills: path
  ground: rect y 530 fill green, plus road line
  shadows: ellipses under wheels
  rear wheel group:
    circle cx230 cy435 r95 fill none stroke #333 stroke-width 16 (tire)
    circle r 78 stroke #999 width 6 (rim)
    spokes: lines at 45° increments from center
    hub circle r 10 fill #555
  front wheel same at 590
  chain: from chainring to rear hub — draw as 2 lines
  frame:
    lines with stroke #e2543e width 10 linecap round:
    (230,435)-(400,435) chainstay
    (230,435)-(355,300) seatstay
    (400,435)-(355,300) seat tube
    (400,435)-(548,295) down tube
    (355,300)-(548,295) top tube
    seatpost (355,300)-(345,262)
    head/fork: (548,295)-(590,435) fork; head tube (548,295)-(556,320)
  chainring circle (400,435) r 30 fill none stroke #555 width 6; teeth? keep simple
  crank arms: (400,435)-(432,472) and (400,435)-(368,398)
  pedals: rects at those points
  handlebar: path M 548,295 L 538,260 then curve, grip
  saddle: ellipse (338, 258) rx 34 ry 10 fill #333
  pelican:
    tail: path behind body
    body: ellipse cx 355 cy 205 rx 62 ry 48 fill #fdfdfb stroke #2e2e3a width 3? Let me go with flat cartoon with subtle outline.
    wing: path inside body
    neck: path from (395,180) C to (470,110), stroke #fdfdfb width 34 linecap round; plus outline? Simpler: draw as filled path shape. Stroke-based neck with outline: draw a slightly bigger darker stroke first, then white stroke on top. Or just fill body+neck as one path. Easiest: draw neck as thick line stroke white with round caps, then overlay smaller line for outline effect — outline won't work well.

Alternative: make pelican flat style without heavy outlines: white/gray fills, orange beak, dark eye. Should look fine.

Neck: thick polyline/curve: path d="M 398 190 C 430 185, 455 165, 462 120" stroke #f7f7f2 width 30. Head circle (465,108) r 20 same fill. This merges.

Beak: upper mandible: path M 470 98 L 640 122 L 470 118 Z fill #f5a623 — long wedge. Pouch: path M 472 112 C 520 150, 590 150, 640 122 C 600 175, 500 175, 468 128 Z fill #ef8b2c. Eye: circle (470, 96) r 4 #222, plus white highlight.

Legs: stroke #f5a623 width 10: from (390, 235) to (432, 470)? Legs: front leg to pedal at (432, 472): path M 395 230 L 415 350 L 432 470? Pelican legs are long and thin, knees bend backwards. Simple: 2-segment polyline. Foot: small webbed triangle on pedal.

Other leg to pedal at (368,398): M 375 230 L 372 340 L 368 398.

Feet: webbed shape at pedal position — small path.

Draw order: sky, sun, clouds, hills, ground, shadow, frame behind? Pelican in front of frame, but legs on top of frame. Draw order: wheels/frame → chainring → pelican legs → body/neck/head/beak → handlebars on top? Handlebar in front of beak maybe — beak extends to x=640 at y~120-160, handlebar at (538,260) — no overlap. Fine.

Let me also add a title text? Maybe caption below SVG in HTML: "Pelican on a Bicycle". Keep simple, page centers the SVG on a nice background.

Let me write index.html.

Done. Please check whether the file exists.