GPT gave me this and it works...:
const msoXModulationTempSave = []; const var NUM_LAYERS = 4; const var I_SIZE = 16; const var J_SIZE = 8; const var K_SIZE = 2; // weil du [..][..][..][0] benutzt, mind. 1 Element for (l = 0; l < NUM_LAYERS; l++) { msoXModulationTempSave.push([]); for (i = 0; i < I_SIZE; i++) { msoXModulationTempSave[l].push([]); for (j = 0; j < J_SIZE; j++) { // letzte Dimension mit Nullen füllen var last = []; for (k = 0; k < K_SIZE; k++) last.push(0); msoXModulationTempSave[l][i].push(last); } } }