<html><head><meta http-equiv="content-type" content="text/html; charset=us-ascii"></head><body style="overflow-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;">If you just want it to loop around, have look at ring multivibrators. These extend the basic 2-transistor multivibrator for more stages. E.g. this schematic from <a href="https://electronics.stackexchange.com/questions/678865/is-there-any-such-thing-as-a-tristable-quadristable-etc-multivibrator">https://electronics.stackexchange.com/questions/678865/is-there-any-such-thing-as-a-tristable-quadristable-etc-multivibrator</a><div><br></div><div><img src="cid:7EB1356A-A2BB-4A20-AA8C-B355583E9E5C" alt="enter image description here.jpeg"></div><div><br></div><div>Replace R2, R3, R4 with your light bulbs (and series resistor is needed) and adjust the capacitors to suit the required frequency.</div><div><br></div><div>Ben</div><div><br id="lineBreakAtBeginningOfMessage"><div><br><blockquote type="cite"><div>On 14 Dec 2025, at 14:58, david walker via Synth-diy <synth-diy@synth-diy.org> wrote:</div><br class="Apple-interchange-newline"><div><div><div class="yahoo-style-wrap" style="font-family:Helvetica Neue, Helvetica, Arial, sans-serif;font-size:13px;"><div dir="ltr" data-setdir="false">Hello hope sum one can help but i got sum <span style="color: rgb(25, 25, 25); font-family: "Market Sans", Arial, sans-serif; font-size: 14px;">Grain of Wheat Bulbs 12V red yellow and green so you can see were i am going with them what i would like to does any have any simple designs like using a 555 or sum other essay to use compotes so make a set of traffic lights so any help would be a big thanks <img title="Emoji" alt="Emoji" class="yahoo-emoji-wrapper" height="16" src="https://s.yimg.com/nq/yemoji_assets/latest/yemoji_assets/1f642.png" width="16" style="padding: 0px 2px; vertical-align: middle;" data-inlineimagemanipulating="true" data-unique-identifier=""> </span></div></div></div>________________________________________________________<br>This is the Synth-diy mailing list<br>Submit email to: Synth-diy@synth-diy.org<br>View archive at: https://synth-diy.org/pipermail/synth-diy/<br>Check your settings at: https://synth-diy.org/mailman/listinfo/synth-diy<br>Selling or trading? Use marketplace@synth-diy.org<br></div></blockquote></div><br></div></body></html>