i found a renderer code
Tessellator t= Tessellator.instance;
WorldRenderer wr=t.getWorldRenderer();
.....
wr.begin(7,DefaultVertexFormats.POSITION_TEX);
wr.pos(-1.1,0,-1.1).tex(0.0,0.0).endVertex();
wr.pos(1.1,0,-1.1).tex(0.0,1.0).endVertex();
wr.pos(1.1,0,1.1).tex(1.0,1.0).endVertex();
wr.pos(-1.1,0,-1.1).tex(1.0,0.0).endVertex();
however,that's the code for ver1.8.0. What code should i take to replace it in ver1.7.10?