CARA MENGGANTI BACKGROUND BERGERAK SECARA OTOMATIS DI BLOGGER

To the point add saja di layout lalu di htmljavascript + 

<div id="content-wrapper"><div id="sidebarleft"><div class="sidebar section" id="sidebar-left"><div class="widget HTML" id="HTML1"><div class="JoeSetApart-block" id="JoeSetApart-block-HTML1"><div class="JoeSetApart-block-body"><div class="JoeSetApart-blockcontent"><div class="JoeSetApart-blockcontent-body"><div class="widget-content"><fieldset class="JSAganti" style="border-radius: 0px 0px 0px 0px; border: 2px solid yellow; margin: 0px;"><legend><div style="color: red; font-family: Comic sans ms; text-align: center; text-shadow: 1px 1px 3px red;">
<div style="color: black; text-align: center;">
<b><span style="font-size: x-small;"><blink>Bosan Sama Backgroundnya?</blink></span></b></div>
</div>

<div style="color: red; font-family: Comic sans ms; text-align: center; text-shadow: 1px 1px 3px red;">
<div style="color: black; text-align: center;">
<span style="font-size: x-small;"><b><blink>Ganti Aja Backgroundnya</blink></b></span></div>
</div></legend>
<select name="DADcbgc" title="Change Background Image" width="900" height="602" onchange="document.body.style.background = this.value;"><option value="url(https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgj-ebTQnytOOFMS5YBZerYN-cq6SSJabwKdfGdNB_EUHsVFQXiWNCuDIbAfrKuec8ItTk9kieBK3r6vBnlL6Gm98NlZNruO_QVtP-PxkOxXZFhPOWJF0dy_jU3f4XCMB7VNrr2utSihWo/s1600/wide-wallpaper-1600x900-004.jpg) repeat center center fixed" />CHANGE BACKGROUND<option value="url(https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjtFIIaDHjriEz53ZHZQxOGglovXEzts_CIiBM6RDyn-SsZCNNUnwDXVq7BsxMYbm1HOHOmZdpiOH-mU1f_MAccM0EjwymEN5SaepqFpb6EY1si5S2mYP6Kppfiv-uEIJkQf71S2u8gm84/s1600/Awan+Akatsuki.gif) repeat center center fixed black" />AKATSUKI<option value="url(https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEh_tk9PeRqzgrY1jKssUzbdtJqiVZaxmeuRs7O86ERMTR32N9_um3HSz2GcDg-v8bImy1Wc6GKxysCnR47zQ7xDSEG7_Dfg3pyHtjFUxkqLdoNwJFH33CkLmOfBd5malzis3nsA2TlXvuM/s1600/greemmatrix.gif) repeat center center fixed black" />GREEN MATRIX<option value="url(https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhoYoYvN3Kegffwm10R7-PQK5V8xTqt0Lu5crtkZ2pyokSKYc8aO4nM_vejEjnW4p_HF49RczKP6GUHdTalnQHeoPpQhrMi-lFVYqWZt4kkXKYf5Mq_NpdGf-yUBdebZbGVDGCRKHtPPd4/s1600/Bluematrix.gif) repeat center center fixed black" />BLUE MATRIX<option value="url(https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEig_mjJ2KH9rNJrxuwcoWX5Uw60_wK76wYrZb5sLrBR-H3Dy2YUHDF39TukdZDZdtzy_wXwPcjMIzenxUBa2wKn_Lr-KahTxCA7WZ5kFCYyx5xxu9Nr8uhNYmETApa9OI0iPvBvgSZldh0/s1600/MatrixGIFfixed.gif) repeat center center fixed black" />RED MATRIX<option value="url(https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgXabDkpKafwFyBDhCB_jbE-jSu6bc7UI8hD75T1kTL_vV7eiLf0zpVEb-OlsTfPg4P0lg5xKyrHlrtx4bYnFr_g4Mh4Y7ng5oVHjI-29-0eknlFl0kKbZZ18XeVm9K79lTum47PwUapsQ/s1600/Blue+Fire.gif) repeat-x bottom center fixed black" />BLUE FIRE<option value="url(https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgGASUfqkI3vEyr-tvKHa0O6SFGLxROTICimoZk-pHxLUaUv7530cPefLhjeeAVElesGCGF0EJ5TxrEZbEDe8IG-9EGTSxVv57dtHd8z_juXICBCCOSh3MiDrwmScysiZWsMqxo9fhMQUI/s1600/Api.gif) repeat-x bottom center fixed black" />RED FIRE<option value="url(https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEglGqQ9ektrQX06fzTqaPMWamlh_0VnLtbDOFpwhCBFs1Ivavn939gDxd6B0nQrHzj0hzB8daLCG7BzYcvgvv8dXgWIlhHpG6KRi2hga-KukY33d5k4z15DBOCn3OCiF06sGzgMTmvUuzI/s1600/Salju.gif) repeat center center fixed black" />SNOW<option value="url(https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhkNBhACeNf5iyAaSoUXbZhE1TnuVU6Yybmv3NB8Q-jJ3zyTRo8_t4QWMBRFrBJFJ55dIiW3evYb9QE0rVK53gPNBr81NO969otI7XhHSAIPUhijuGFCZxe6HBcsyoHw_8Ux8IeOmJURe4/s1600/Bintang.gif) repeat center center fixed black" />STAR V1<option value="url(https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEj4MF4iIeTncc2wpx0vNPkR0SLflXwltsW1MGMcFEudTbpT1q7eiheSLtxUA2peffZtnkduDJcKl3cP5Pim-IDn8zpEFdwsbZsghRjEJdAEMNXcoTjJ01GQ-gQ89wttMnEotyEYddtdM3A/s1600/Hujan.gif) repeat center center fixed black" />RAIN V1<option value="url(https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhErvwjBbdnXZl2uLrL39VJJHrtV8CvZsiL4z5SWu-nSPox2gF8pbWal4aJIjIVfDAdfZl73a3osL8n3rwzuLyi6ye0PV6cC5wn9PWazg4syS55X-XcCo7CIKL9ET107gILko_mn9mTYTs/s1600/evil.gif) repeat center center fixed black" />HEAD EVIL<option value="url(https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEinSj9jIxESYNRXLRABJLjhSLPKVO2KM7dj0K6uKMHYZiuRyZNhiPX4VEW9-HzTzLcqTehWpwiTlz4Z4asbmrdzPxxYBmlywYDHOtHXbVLc_iv2llyQd5GWepXXdvXlRCcK9oTbsXOb_fc/s1600/RAINFALL.gif) repeat center center fixed black" />RAIN V2<option value="url(https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiTNye3tvH_wbxLcSlD8VJfi8EMITPCMDSbEcCYCdP05kauuKGBK-q4OrgFWBYB1KfSiy4xh7Gt7SZnxeqMggsiorXLxDa_IS85T63jFnZqlVo71BUmjEt2miIZs_pUCm7EsV1tFTgXA8E/s1600/Storm_2.gif) repeat center center fixed black" />STORM<option value="url(https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjj3jDJfQvHilVvu2Pyh99l24wdWxA8rMlorofP4Ai5WhnRXfBncligZ87pVlYXlbyx9SoE303IVLaCMIDDnFjayg2gM9nFQrzNrMU-5oxDvaWrNp39cmrENlmKlOlHbhbdOSCqYPalDLg/s1600/falling-leaves.gif) repeat center center fixed black" />FALLING LEAVES<option value="url(https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEg76I7FecWuXr2-8ld-DcKWMucvM0IgJC3-fhvYWYyeuIANmUdNyEC3E2BDF6uIgB-lKE-rCaQcs7dX6vtHyjHYK7_MlMyXxBvTdS_yHr-vSNL8xOhDL30biWJm3TTQlzvbyuavd_Rh09o/s1600/tumblr_mfcey18D241rvddhwo1_500.gif) repeat center center fixed black" />WATER FALL<option value="url(https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjgdqTOehE001UotvkGgo3FdQkgsnL6SAIoSr9OGxraE8hgHKtwtj0Wz3nrSSjbGvxnJozWxsVH7pjQQXf_z412lQnXK1jKWgeH04iiZhKksPX40aPPvz5bT7ZuDTJPqWl8WcZcpk3XcGc/s1600/water-blue-animated.gif) repeat center center fixed black" />WATER V1<option value="url(https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjZFmCTSgVl56SPugO2TcZxDeIEnEdo2sLKhyphenhyphenIcEgzsQwgxQ-YLPoes3N9CPClbhg7YUFENGOmWsm_tFNujs8l2k2I7HqR87LC03tYkbc3p0dcnGDKN2xjMcXsqtKUZ9KVm13KefKR-Ybg/s1600/animeer_21.gif) repeat center center fixed black" />WATER v2<option value="url(https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEg0ix75P3fWZIQg5sUeLquEZBivIVcbh9qFa9BGlXgDXL9U4CeTXLciptzu3N7S4zWLYQvwHdAEL4StjOzq13GzQU71g89WItM5hTW58TAWWAeVF4l7IYB6npt0kvofFDm1j82m8x_hcKQ/s1600/bubbles-rain-bow-colour.gif) repeat center center fixed black" />BUBBLE<option value="url(https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEikPAli5d6dWYfbj2jJ-GMtEUCvaJ4-ELOADvUWw-80U22LJgRn4oz12oFk4r6aJVbgxRB-uDtqAgsmLrF_sfCVK2pKUSR_o5k4p2ocVjAdf-F93QEby5NAEbHICoqJeJl_PyBoOXwXaaw/s1600/animated-leaves-falling-maple.gif) repeat center center fixed black" />SPRING<option value="url(https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEg8aGlMmpV_2ezJ_UqTgAjTLCWJffWHrSH8pYZu3MpEZgEBmb59iCeJbqD_QctXn5d_MeRSxLoVJTUJhxorudF8_apZlP3r5w_rNtgExjkfbykuyDmkqs-BUVPDlN1QV7w2kXciXWe9NDk/s1600/tumblr_mfr4mvaPOs1qieq9mo1_500.gif) repeat center center fixed black" />FIREWORK<option value="url(https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjsOEpgdKI4irDQJwRWEruCg112DIjYQApe3_CFRBX-SNGyk16e_BJJeMbffm4BNlyHDoJ6kxyvRl5OV0QKRP76KiyPxLAlIqMcYbSzNVvwmpDVK5UB2VzIxVYd3ycqg_uWMLbdCOTvmFM/s1600/star.gif) repeat center center fixed black" />STAR V2</select>
<div align="left">
<span style="font-family: arial;"><span style="font-size: x-small;">Dapatkan tips-trik</span> <span style="font-size: x-small;"><a href="http://be-science.blogspot.com/2013/07/cara-mengganti-background-bergerak.html" target="_blank">Klik Disini</a></span></span></div>

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selamat mencoba!! (fixed)