'PROCEDURE' ELPER.,
'BEGIN' JI1.=JS1., JI2.=JS5.,
        ELIRR
'END' ELPER.,

'BEGIN' 'COMMENT' TEXTUR
MIT ELPER.,
N.=20.,
JLI.=-10., JRE.=30.,
JUN.=-10., JOB.=30.,
T.=0.,
SERIE(20.0,20.0,8,6,ELPER).,
T.=1.,
SERIE(20.0,20.0,8,6,ELPER).,
'END'.,

'COMMENT' T=0 fig. 47, T=1 fig. 48.

function ELPER() {
  JI1 = JS1; JI2 = JS5;
  ELIRR();
}
N = 20; T = 1;
JLI = -10; JRE = 30;
JUN = -10; JOB = 30;
SERIE(20, 20, 8, 6, ELPER);
// Sheet 90°, +X down — teeth as in the scan.

Approximate rendering. The same block as figure 47, then T = 1 and another SERIE. ELPER reloads JS1 and JS5 in every cell, so the diagonals are congruent — a toothed repeat. Sheet rotated 90° like the texture chapters, but with +X down so the left points and bottom triangles sit as in the scan. SERIE(20,20,8,6). Flip turns the sheet over.

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