Cambiar el color de fondo de nuestro blog agregando botones atraves de un Gadget

Primero, vamos a ''Diseño | Añadir un gadget'', en donde añades un gadget ''HTML/Javascript"

y luego pegamos el siguiente código:

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<td><span onclick="javascript:document.body.style.backgroundColor='#f6f4c1'; document.body.style.backgroundImage='none';"><img src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgEg9Z2Zdv4g-zi_dZpBcQQjqBk3XCDnwzSpaU1Sb8W0HiUpg-EKYktpW4NQMYBNlWJ4kWqaVWujgt4Ax7mNGMz1gu8_mei6Iu1b3b5-j5FEIyEnlz1Bj4c3J2uUyN5e4ibDy0f9KplSP6X/s320/blfondoamarillo.png" style="cursor: pointer ! important;" border="1" /></span></td>

<td><span onclick="javascript:document.body.style.backgroundColor='#c1c9f6'; document.body.style.backgroundImage='none';"><img src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjAWkpvqrv6orEqlz7WZeJfuiZIWQS_pQcVhxJZc9GHZtwtViiKWG2j_MEQnrNxo9F3HRtsBzqmIdhBAbMipIqi8ta8Oo7bnip884bB8vge1B6px-qXrZOAG9WCUGhgQ_w34V-IuY1YbJVt/s320/blfondoazul.png" style="cursor: pointer ! important;" border="1" /></span></td>

<td><span onclick="javascript:document.body.style.backgroundColor='#f6eac1'; document.body.style.backgroundImage='none';"><img src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEga-hqn4ukNP4J8GWSbz36_OTbubdVbDUeWlbtT0DPa8AX78EDtPOoRS0xIeYkQDTqmAtcGpYg4mG3cdYyCliJey96F_S4phTOc91T7yWgq-S7oQkrV5suoOJHX-hDm2TpYUrT2W-Y1JZfG/s320/blfondonaranja.png" style="cursor: pointer ! important;" border="1" /></span></td>

<td><span onclick="javascript:document.body.style.backgroundColor='#cccccc'; document.body.style.backgroundImage='none';"><img src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhrg4olP8d0ncCschzYg4HEZ-BzYkgTKPIWRNCMJWzyJetwWnGM4YegJS_jwewtH6n-8btiPgda75Y4MC9MVZFKnJdoYWxpTYCLUGp5xiuG_1WN3-9H_FCqwK8V6zYeFZKqQ_CRNeq4fTMT/s320/blfondogris.png" style="cursor: pointer ! important;" border="1" /></span></td>

<td><span onclick="javascript:document.body.style.backgroundColor='#ffffff'; document.body.style.backgroundImage='none';"><img src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiHCtmjZPDD2r9ts25Q_QgnJ8Wqn7Xc9WStkw9IcSU_YpSVYmLDy7WdwvHswaD7fuIKouJWIBJ8PTY80ic1O9lPN-cIpHahIuW79RnfENJ8_v0eAZ-PcC38oH0Z6QoEbQFyOJDoezHoQw_I/s400/blfondoblanco.png" style="cursor: pointer ! important;" border="1" /></span></td>

<td><span onclick="javascript:document.body.style.backgroundColor='#e4dbb9'; document.body.style.backgroundImage='none';"><img src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhd3DMMm2cH_mZ239Zuz1ZfMaj9Fuw5F8a6gg4JMxVj7K8H1EiM_T9NLR0RiaJ2156Lz1ae-Bg2iUlCA7IQDhmgk6P8pnymdLZbw490zPHJi_GvwKGr54ac_Tbn_lYiRDVxjViNtBy5T0iV/s320/blfondomarron.png" style="cursor: pointer ! important;" border="1" /></span></td>

<tr>

<td><span onclick="javascript:document.body.style.backgroundColor='#e6f9e6'; document.body.style.backgroundImage='none';"><img src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiI-bBoNnwhUQCsvH1f8jIRGPLkOV1cLEo666_lgkYKFvfDXT8wd8qRP_9Fxs0ezmxXfstiy2q4xw4K-NH5AqXLYNeFSbCEjinjA2QROn6DPh2WKszg-ZeQ76eEB6ysxVWiSjkV1m2mINgB/s320/blfondoverde.png" style="cursor: pointer ! important;" border="1" /></span></td>

<td><span onclick="javascript:document.body.style.backgroundColor='#f6c2c1'; document.body.style.backgroundImage='none';"><img src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhKnhUWt5VtMZ5_7LNuv4MWAzPSIBCVnrBbD3OFNPVT4J-XpaGdWJ2Av9a5wmpWG8rvXkFZrwLEhJwnHAx_X8TeCxPe_xKaJzVaYfjVEw7RHRvMwLVdRYauwFD2yhZI_1gVUp6U9PAXUSJ8/s320/blfondorojo.png" style="cursor: pointer ! important;" border="1" /></span></td>

<td><span onclick="javascript:document.body.style.backgroundColor='#f9e6e9'; document.body.style.backgroundImage='none';"><img src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEix-amjPAL8XkNPtLkwZm7t9BI5xkuHNLkkoDhTIcvFsOIXOw9nOvrGXmCOPbdQTH2DhnR9Lp4G6WSncPxHtPDaGQm3wi_6hyEe9AZNrfUc-s2q8tNNo5aU8St12JEKDihUYQcUgrpMN3vE/s320/blfondorosa.png" style="cursor: pointer ! important;" border="1" /></span></td>

<td><span onclick="javascript:document.body.style.backgroundColor='#d1b9e4'; document.body.style.backgroundImage='none';"><img src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjfYjGaN3Iqqpg4xV7Y37skHQWDeeH_b-3SmgaPmu24QzZQnnEYla9gpT5CNYqb6p2kYUUy5gdXjDxK2ry4m4xKQWvuuOVE-rWh0JFnFEt6HkPVzwxzSFGTElZGf9xhUPgQAdvD49mXXKeX/s320/blfondomorado.png" style="cursor: pointer ! important;" border="1" /></span></td>

<td><span onclick="javascript:document.body.style.backgroundColor='#000000'; document.body.style.backgroundImage='none';"><img src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjEAbHBWXm6EXNhHs3-1WOIurf8rFNiy9qQUtxBewUoc87yQ6-u4DmHr1ifzoJUc34icR5ebHeGrNcpPXWo62VusD5r4WCe5EV-W1Zy0UoyT6okkQKC-GQLxNr2gwvEkTBS4B_1cImZ6HUy/s320/blfondonegro.png" style="cursor: pointer ! important;" border="1" /></span></td>

<td><span onclick="javascript:document.body.style.backgroundColor='#ECEEF3'; document.body.style.backgroundImage='none';"><img src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhvA1M9imLvx_LEo7nKnNspuYh-UiD9G-YCcU_XpxTlMYoviB8kypc-tIy_Sy9NRbyXZCaeGUicpo12jdqn9VZszIvZTh-Ku2DUFLsnbyguG_To2u-Q3K2nqb0zKcB77CF1TK6UPV-dKh3r/s400/blfondoazul2.png" style="cursor: pointer ! important;" border="1" /></span></td></tr>

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Guardamos los cambios y listo