请问各位老师，怎么改变基因顺序，即让各组的红蓝色对调一下，让cancer组红色在上蓝色在下，normal组红色在下蓝色在上？下面是我的代码，请问该如何调整

lncRNA_exp_heatmap<-lncRNA_exp[row.names(final_DElncRNA),]

ann_col = data.frame(Type = factor(rep(c("cancer","Normal"),c(3,3)) )) 

rownames(ann_col) <- colnames(lncRNA_exp_heatmap)

ann_colors = list(Type = c(cancer = "indianred2", Normal = "mediumpurple3"))

bk = unique(c(seq(-5,5, length=1000)))

pheatmap(lncRNA_exp_heatmap,

         annotation_col = ann_col,annotation_legend=TRUE,annotation_colors = ann_colors,breaks = bk,scale = 'row',

         cluster_rows=TRUE,cluster_cols=TRUE,show_colnames = TRUE,show_rownames = FALSE,

         color = colorRampPalette(c("blue","white","red"))(1000))