Fix style and default size in high_frequency example
Fix style and default size in high_frequency example

bollu/vispy,srinathv/vispy,Eric89GXL/vispy,inclement/vispy,drufat/vispy,kkuunnddaannkk/vispy,ghisvail/vispy,kkuunnddaannkk/vispy,inclement/vispy,jay3sh/vispy,dchilds7/Deysha-Star-Formation,RebeccaWPerry/vispy,sbtlaarzc/vispy,sh4wn/vispy,sbtlaarzc/vispy,jay3sh/vispy,julienr/vispy,inclement/vispy,QuLogic/vispy,jdreaver/vispy,bollu/vispy,QuLogic/vispy,dchilds7/Deysha-Star-Formation,srinathv/vispy,srinathv/vispy,hronoses/vispy,jdreaver/vispy,RebeccaWPerry/vispy,jdreaver/vispy,ghisvail/vispy,hronoses/vispy,dchilds7/Deysha-Star-Formation,michaelaye/vispy,sbtlaarzc/vispy,michaelaye/vispy,michaelaye/vispy,drufat/vispy,julienr/vispy,hronoses/vispy,QuLogic/vispy,ghisvail/vispy,jay3sh/vispy,drufat/vispy,sh4wn/vispy,julienr/vispy,sh4wn/vispy,kkuunnddaannkk/vispy,RebeccaWPerry/vispy,Eric89GXL/vispy,Eric89GXL/vispy,bollu/vispy