function arrowx(moreAttrs) {
const attrs = {fill:'none',stroke:'black','stroke-width':2};
Object.assign(attrs,moreAttrs);
const points = [[0,0.2],[0.6,0.2],[0.6,0.4],[1,0],[0.6,-0.4],[0.6,-0.2],[0,-0.2]];
return svgt`<polygon points="${points}" ${attrs}/>`
}